diff --git a/README.md b/README.md
index f9b5c63..503a971 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,26 @@
 
 Application React (Vite) : livres enregistrés localement (équivalent métier `POST /api/books`), React Router, `useContext`, Axios (Open Library).
 
+## Ce qu’on a rajouté (branche Patrick_commande_promo, tout en français courant)
+
+En gros : on a continué sans brancher **aucun backend** du cours. Les “POST” sont simulés dans le navigateur avec du **React (Context)** et du **`localStorage`**.
+
+- **Commande** (`/commande`) : tu choisis des livres avec une quantité, tu peux entrer un code promo si tu en as créé une, et tu passes la commande. Ça revient métier à un `POST /api/orders`, sauf que tout est enregistré localement sous la clé `librairie-orders`.
+- **Promotions** (`/promotions`) : tu crées des codes promo (pour l’instant c’est une remise en %), tu peux les activer / désactiver / supprimer. C’est le pendant local d’un `POST /api/promotions`, stocké sous `librairie-promotions`.
+- **Prix des livres** : chaque livre a un champ **prix (€)** (formulaire, fiche détail, liste ; les anciens livres sans prix prennent 10 € par défaut). Les résultats ajoutés depuis Open Library partent aussi sur un prix par défaut.
+- **Navigation** : dans le menu en haut, liens **Commande** et **Promotions** en plus de Mes livres / Recherche.
+
+## Ce qu’on a rajouté (branche Patrick_reserve_retourne__avis_livre, tout en français courant)
+
+Même logique que la branche d’au-dessus : **pas de backend** du projet, on simule les endpoints avec du **Context** + **`localStorage`**, comme si on faisait des `POST` / `GET` mais que tout reste dans le navigateur.
+
+- **Réserver un livre** (`POST /api/books/:id/reservations`) : tu vas sur la fiche d’un livre (`/<id>` dans l’URL, ou en cliquant sur un titre), tu tapes sur **Réserver**. Une réservation **active** à la fois pour un même livre (sinon ça bloque, logique biblio pas folle sinon). Ça vit dans **`librairie-reservations`**.
+- **Gérer le retour** (`POST /api/returns`) : page dédiée **Retours** (`/retours`) — vue “biblio qui récupère les exemplaires”. Tu vois les réservations pas encore rendues, tu cliques **Enregistrer le retour**, et ça part dans l’historique. Toujours le même stockage **`librairie-reservations`** que pour réserver : on ajoute juste une date de retour à l’entrée.
+- **Avis sur un livre** (`POST /api/books/:id/reviews`) : toujours sur la fiche du livre, tu mets une **note sur 5** + un **petit pavé de texte**, tu publies, et tes avis s’affichent en dessous. Stocké sous **`librairie-reviews`** (un livre peut en avoir plusieurs, pas de problème).
+- **Navigation** : on a rajouté le lien **Retours** dans la barre du haut avec le reste.
+
+Les données qui tournaient déjà (`librairie-books` pour le catalogue, puis `librairie-orders` et `librairie-promotions` si tu viens de l’autre branche) : **toujours zéro serveur**, tout est chez toi dans le navigateur, pas sur l’infra du cours.
+
 ## Les membres du projet
 
 Marvin Aubert, Maxime Lebreton et Patrick Felix-Vimalaratnam
@@ -49,5 +69,8 @@ npm run build
 **Tests manuels dans le navigateur** (après `npm run dev`) :
 
 1. **Mes livres** (`/`) : enregistrer un nouveau livre (libellés + `POST /api/books` côté UI), supprimer, filtrer (Tous / Lus / À lire), rechercher dans la liste.
-2. **Fiche livre** : cliquer sur le titre d’un livre ou aller sur `/<id>` ; vérifier lu / non lu et suppression avec retour à **Mes livres**.
+2. **Fiche livre** (`/<id>`) : lu / non lu, suppression, **Réserver**, publier un **avis** puis vérifier l’historique sous le formulaire.
 3. **Recherche** (`/recherche`) : recherche Open Library (Internet), enregistrer un résultat (même logique que `POST /api/books` en local), puis vérifier qu’il apparaît sous **Mes livres**.
+4. **Promotions** (`/promotions`) : créer un code promo (ex. `BUT10` avec −10 %), puis vérifier que tu peux le désactiver / le réactiver / le supprimer.
+5. **Commande** (`/commande`) : mettre au moins un livre avec une quantité strictement positive, tester sans promo puis avec le code créé avant ; passer la commande et vérifier le message + que le sous-total, la remise et le total sont cohérents (toujours en local).
+6. **Retours** (`/retours`) : après une réservation, vérifier que le livre apparaît puis **Enregistrer le retour** ; vérifier l’historique et que tu peux de nouveau réserver le même titre.
diff --git a/src/App.css b/src/App.css
index b790e26..66a82fa 100644
--- a/src/App.css
+++ b/src/App.css
@@ -593,3 +593,345 @@
   flex-wrap: wrap;
   gap: 0.5rem;
 }
+
+.page-title {
+  font-family: var(--font-display);
+  margin: 0 0 0.5rem;
+  color: var(--ink);
+}
+
+.page-lead {
+  margin: 0 0 1.25rem;
+  color: var(--ink-muted);
+  max-width: 60ch;
+}
+
+.form-error {
+  color: var(--danger);
+  margin: 0 0 1rem;
+}
+
+.form-notice {
+  margin: 0 0 1rem;
+  color: var(--ink);
+}
+
+.order-grid,
+.promo-grid {
+  display: grid;
+  grid-template-columns: 1.2fr 0.8fr;
+  gap: 1.25rem;
+  align-items: start;
+}
+
+@media (max-width: 900px) {
+  .order-grid,
+  .promo-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
+.order-panel {
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 1rem 1.1rem;
+  box-shadow: var(--shadow);
+}
+
+.panel-title {
+  font-family: var(--font-display);
+  margin: 0 0 0.75rem;
+  font-size: 1.1rem;
+}
+
+.order-catalog,
+.promo-list,
+.order-summary {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.6rem;
+}
+
+.order-catalog-item,
+.promo-item {
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  padding: 0.75rem 0.85rem;
+  background: var(--paper);
+}
+
+.order-catalog-main,
+.promo-item-main {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.order-book-title,
+.promo-code {
+  margin: 0;
+  font-weight: 700;
+}
+
+.order-book-meta,
+.promo-meta {
+  margin: 0.2rem 0 0;
+  color: var(--ink-muted);
+  font-size: 0.9rem;
+}
+
+.qty {
+  display: grid;
+  gap: 0.25rem;
+  align-items: center;
+  justify-items: end;
+}
+
+.qty-label {
+  font-size: 0.75rem;
+  color: var(--ink-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.qty input,
+.promo-input,
+.promo-form input {
+  font: inherit;
+  padding: 0.45rem 0.55rem;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  background: var(--card);
+  color: var(--ink);
+  width: 7rem;
+}
+
+.promo-input {
+  width: 100%;
+}
+
+.order-summary-item {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  color: var(--ink);
+}
+
+.promo-box {
+  margin: 1rem 0;
+  padding: 0.9rem;
+  border-radius: 12px;
+  border: 1px solid var(--border);
+  background: var(--paper);
+}
+
+.promo-label {
+  display: grid;
+  gap: 0.35rem;
+  font-size: 0.8rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--ink-muted);
+}
+
+.promo-hint {
+  margin: 0.55rem 0 0;
+  font-size: 0.9rem;
+  color: var(--ink-muted);
+}
+
+.promo-warn {
+  margin: 0.55rem 0 0;
+  color: var(--danger);
+}
+
+.promo-ok {
+  margin: 0.55rem 0 0;
+}
+
+.totals {
+  border-top: 1px solid var(--border);
+  padding-top: 0.9rem;
+  margin-top: 0.9rem;
+  margin-bottom: 0.9rem;
+}
+
+.totals-row {
+  display: flex;
+  justify-content: space-between;
+  margin: 0.25rem 0;
+  color: var(--ink-muted);
+}
+
+.totals-row.total {
+  color: var(--ink);
+  font-weight: 800;
+  margin-top: 0.6rem;
+}
+
+.promo-form {
+  display: grid;
+  gap: 0.75rem;
+}
+
+.promo-form label {
+  display: grid;
+  gap: 0.35rem;
+  font-size: 0.8rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--ink-muted);
+}
+
+.promo-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.35rem;
+  justify-content: flex-end;
+}
+
+.book-detail .badge + .badge {
+  margin-left: 0.35rem;
+}
+
+.book-section {
+  margin: 1.5rem 0;
+  padding: 1rem 1.1rem;
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  box-shadow: var(--shadow);
+  max-width: 520px;
+  text-align: left;
+}
+
+.book-section-title {
+  font-family: var(--font-display);
+  font-size: 1.1rem;
+  margin: 0 0 0.35rem;
+  color: var(--ink);
+}
+
+.book-section-lead {
+  margin: 0 0 1rem;
+  font-size: 0.88rem;
+  color: var(--ink-muted);
+}
+
+.book-section-lead code {
+  font-size: 0.85em;
+}
+
+.book-section-link {
+  display: inline-block;
+  margin-top: 0.75rem;
+}
+
+.review-form {
+  display: grid;
+  gap: 0.75rem;
+}
+
+.review-form label {
+  display: grid;
+  gap: 0.35rem;
+  font-size: 0.8rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--ink-muted);
+}
+
+.review-form select,
+.review-form textarea {
+  font: inherit;
+  padding: 0.55rem 0.65rem;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  background: var(--paper);
+  color: var(--ink);
+}
+
+.book-reviews-empty {
+  margin: 1rem 0 0;
+}
+
+.reviews-list {
+  list-style: none;
+  margin: 1rem 0 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.reviews-item {
+  padding: 0.75rem 0.85rem;
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  background: var(--paper);
+}
+
+.reviews-meta {
+  margin: 0 0 0.35rem;
+  font-size: 0.85rem;
+  color: var(--ink-muted);
+}
+
+.reviews-text {
+  margin: 0;
+  font-size: 0.95rem;
+  white-space: pre-wrap;
+}
+
+.retours-page {
+  text-align: left;
+}
+
+.retours-panel {
+  margin-bottom: 1.25rem;
+}
+
+.retours-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.65rem;
+}
+
+.retours-item {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.75rem;
+  padding: 0.75rem 0.85rem;
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  background: var(--paper);
+}
+
+.retours-item.muted {
+  opacity: 0.82;
+}
+
+.retours-book {
+  margin: 0;
+  font-weight: 700;
+}
+
+.retours-meta,
+.retours-id {
+  margin: 0.2rem 0 0;
+  font-size: 0.88rem;
+  color: var(--ink-muted);
+}
diff --git a/src/App.jsx b/src/App.jsx
index c69dcfb..5d362fe 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -1,7 +1,10 @@
 import { Route, Routes } from 'react-router-dom'
 import { RootLayout } from './layout/RootLayout.jsx'
 import BookDetailPage from './pages/BookDetailPage.jsx'
+import CommandePage from './pages/CommandePage.jsx'
 import MesLivresPage from './pages/MesLivresPage.jsx'
+import PromotionsPage from './pages/PromotionsPage.jsx'
+import RetoursPage from './pages/RetoursPage.jsx'
 import SearchPage from './pages/SearchPage.jsx'
 import './App.css'
 
@@ -11,6 +14,9 @@ export default function App() {
       <Route path="/" element={<RootLayout />}>
         <Route index element={<MesLivresPage />} />
         <Route path="recherche" element={<SearchPage />} />
+        <Route path="commande" element={<CommandePage />} />
+        <Route path="promotions" element={<PromotionsPage />} />
+        <Route path="retours" element={<RetoursPage />} />
         <Route path=":id" element={<BookDetailPage />} />
       </Route>
     </Routes>
diff --git a/src/components/BookForm.jsx b/src/components/BookForm.jsx
index 9a44a28..b15acce 100644
--- a/src/components/BookForm.jsx
+++ b/src/components/BookForm.jsx
@@ -5,6 +5,7 @@ const emptyForm = () => ({
   author: '',
   year: new Date().getFullYear(),
   genre: '',
+  price: 10,
   read: false,
 })
 
@@ -71,6 +72,22 @@ export function BookForm({ onSubmit }) {
             placeholder="Roman, essai…"
           />
         </label>
+        <label>
+          Prix (€)
+          <input
+            type="number"
+            min={0}
+            step="0.5"
+            value={form.price}
+            onChange={(e) =>
+              setForm((f) => ({
+                ...f,
+                price: Number(e.target.value),
+              }))
+            }
+            placeholder="Ex. 12.5"
+          />
+        </label>
       </div>
       <label className="checkbox-row">
         <input
diff --git a/src/components/BookList.jsx b/src/components/BookList.jsx
index ffc2ea0..d4384d2 100644
--- a/src/components/BookList.jsx
+++ b/src/components/BookList.jsx
@@ -76,7 +76,9 @@ export function BookList({
                 </Link>
               </h3>
               <p className="author">{book.author}</p>
-              <p className="year">{book.year}</p>
+              <p className="year">
+                {book.year} · {Number(book.price ?? 10).toFixed(2)} €
+              </p>
               <div className="card-actions">
                 <button
                   type="button"
diff --git a/src/context/BooksContext.jsx b/src/context/BooksContext.jsx
index 83a936f..5bf26e8 100644
--- a/src/context/BooksContext.jsx
+++ b/src/context/BooksContext.jsx
@@ -15,6 +15,7 @@ const demoBooks = [
     author: 'Antoine de Saint-Exupéry',
     year: 1943,
     genre: 'Conte',
+    price: 8.5,
     read: true,
   },
   {
@@ -23,16 +24,25 @@ const demoBooks = [
     author: 'George Orwell',
     year: 1949,
     genre: 'Science-fiction',
+    price: 9.9,
     read: false,
   },
 ]
 
+function normalizeBook(b) {
+  const price = Number(b?.price)
+  return {
+    ...b,
+    price: Number.isFinite(price) ? price : 10,
+  }
+}
+
 function loadBooks() {
   try {
     const raw = localStorage.getItem(STORAGE_KEY)
     if (raw === null) return demoBooks
     const parsed = JSON.parse(raw)
-    return Array.isArray(parsed) ? parsed : demoBooks
+    return Array.isArray(parsed) ? parsed.map(normalizeBook) : demoBooks
   } catch {
     return demoBooks
   }
@@ -54,7 +64,7 @@ export function BooksProvider({ children }) {
   /** Équivalent métier d’un POST /api/books (ici : persistance locale + id généré). */
   const postBook = useCallback((book) => {
     const id = crypto.randomUUID()
-    setBooks((prev) => [...prev, { ...book, id }])
+    setBooks((prev) => [...prev, normalizeBook({ ...book, id })])
   }, [])
 
   const removeBook = useCallback((id) => {
diff --git a/src/context/OrdersContext.jsx b/src/context/OrdersContext.jsx
new file mode 100644
index 0000000..3683454
--- /dev/null
+++ b/src/context/OrdersContext.jsx
@@ -0,0 +1,113 @@
+import {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+} from 'react'
+
+const STORAGE_KEY = 'librairie-orders'
+
+function loadOrders() {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (raw === null) return []
+    const parsed = JSON.parse(raw)
+    return Array.isArray(parsed) ? parsed : []
+  } catch {
+    return []
+  }
+}
+
+function saveOrders(orders) {
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(orders))
+}
+
+function round2(n) {
+  return Math.round((Number(n) + Number.EPSILON) * 100) / 100
+}
+
+function calcSubtotal(items) {
+  return round2(
+    items.reduce((sum, it) => sum + Number(it.unitPrice) * Number(it.qty), 0),
+  )
+}
+
+function calcDiscount({ subtotal, promotion }) {
+  if (!promotion) return 0
+  if (promotion.type === 'percent') {
+    const pct = Number(promotion.value)
+    if (!Number.isFinite(pct) || pct <= 0) return 0
+    return round2((subtotal * pct) / 100)
+  }
+  return 0
+}
+
+const OrdersContext = createContext(null)
+
+export function OrdersProvider({ children }) {
+  const [orders, setOrders] = useState(loadOrders)
+
+  useEffect(() => {
+    saveOrders(orders)
+  }, [orders])
+
+  /**
+   * Équivalent local d’un POST /api/orders.
+   * orderDraft: { items: [{ bookId, title, unitPrice, qty }], promotion?: { code, type, value } }
+   */
+  const createOrder = useCallback((orderDraft) => {
+    const items = Array.isArray(orderDraft?.items) ? orderDraft.items : []
+    const cleaned = items
+      .map((it) => ({
+        bookId: String(it.bookId),
+        title: String(it.title || ''),
+        unitPrice: Number(it.unitPrice),
+        qty: Math.max(0, Math.trunc(Number(it.qty) || 0)),
+      }))
+      .filter((it) => it.bookId && it.qty > 0 && Number.isFinite(it.unitPrice))
+
+    if (cleaned.length === 0) {
+      throw new Error('Aucun article dans la commande')
+    }
+
+    const subtotal = calcSubtotal(cleaned)
+    const promotion = orderDraft?.promotion
+      ? {
+          code: String(orderDraft.promotion.code || ''),
+          type: String(orderDraft.promotion.type || 'percent'),
+          value: Number(orderDraft.promotion.value),
+        }
+      : null
+    const discount = calcDiscount({ subtotal, promotion })
+    const total = round2(Math.max(0, subtotal - discount))
+
+    const order = {
+      id: crypto.randomUUID(),
+      createdAt: new Date().toISOString(),
+      items: cleaned,
+      promotion: promotion && promotion.code ? promotion : null,
+      subtotal,
+      discount,
+      total,
+    }
+
+    setOrders((prev) => [order, ...prev])
+    return order
+  }, [])
+
+  const value = useMemo(() => ({ orders, createOrder }), [orders, createOrder])
+
+  return <OrdersContext.Provider value={value}>{children}</OrdersContext.Provider>
+}
+
+// eslint-disable-next-line react-refresh/only-export-components
+export function useOrders() {
+  const ctx = useContext(OrdersContext)
+  if (!ctx) {
+    throw new Error('useOrders doit être utilisé dans un OrdersProvider')
+  }
+  return ctx
+}
+
diff --git a/src/context/PromotionsContext.jsx b/src/context/PromotionsContext.jsx
new file mode 100644
index 0000000..ec02a15
--- /dev/null
+++ b/src/context/PromotionsContext.jsx
@@ -0,0 +1,122 @@
+import {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+} from 'react'
+
+const STORAGE_KEY = 'librairie-promotions'
+
+function loadPromotions() {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (raw === null) return []
+    const parsed = JSON.parse(raw)
+    return Array.isArray(parsed) ? parsed : []
+  } catch {
+    return []
+  }
+}
+
+function savePromotions(promotions) {
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(promotions))
+}
+
+function normalizeCode(code) {
+  return String(code || '')
+    .trim()
+    .toUpperCase()
+    .replace(/\s+/g, '')
+}
+
+const PromotionsContext = createContext(null)
+
+export function PromotionsProvider({ children }) {
+  const [promotions, setPromotions] = useState(loadPromotions)
+
+  useEffect(() => {
+    savePromotions(promotions)
+  }, [promotions])
+
+  const createPromotion = useCallback((promo) => {
+    const code = normalizeCode(promo.code)
+    const value = Number(promo.value)
+    if (!code) throw new Error('Code promo invalide')
+    if (!Number.isFinite(value) || value <= 0) {
+      throw new Error('Valeur de promo invalide')
+    }
+
+    setPromotions((prev) => {
+      if (prev.some((p) => p.code === code)) {
+        throw new Error('Ce code promo existe déjà')
+      }
+      return [
+        ...prev,
+        {
+          id: crypto.randomUUID(),
+          code,
+          type: 'percent',
+          value,
+          active: true,
+          createdAt: new Date().toISOString(),
+        },
+      ]
+    })
+  }, [])
+
+  const setPromotionActive = useCallback((code, active) => {
+    const normalized = normalizeCode(code)
+    setPromotions((prev) =>
+      prev.map((p) => (p.code === normalized ? { ...p, active } : p)),
+    )
+  }, [])
+
+  const removePromotion = useCallback((code) => {
+    const normalized = normalizeCode(code)
+    setPromotions((prev) => prev.filter((p) => p.code !== normalized))
+  }, [])
+
+  const getActivePromotionByCode = useCallback(
+    (code) => {
+      const normalized = normalizeCode(code)
+      return promotions.find((p) => p.code === normalized && p.active) || null
+    },
+    [promotions],
+  )
+
+  const value = useMemo(
+    () => ({
+      promotions,
+      createPromotion,
+      removePromotion,
+      setPromotionActive,
+      getActivePromotionByCode,
+      normalizeCode,
+    }),
+    [
+      promotions,
+      createPromotion,
+      removePromotion,
+      setPromotionActive,
+      getActivePromotionByCode,
+    ],
+  )
+
+  return (
+    <PromotionsContext.Provider value={value}>
+      {children}
+    </PromotionsContext.Provider>
+  )
+}
+
+// eslint-disable-next-line react-refresh/only-export-components
+export function usePromotions() {
+  const ctx = useContext(PromotionsContext)
+  if (!ctx) {
+    throw new Error('usePromotions doit être utilisé dans un PromotionsProvider')
+  }
+  return ctx
+}
+
diff --git a/src/context/ReservationsContext.jsx b/src/context/ReservationsContext.jsx
new file mode 100644
index 0000000..0407a67
--- /dev/null
+++ b/src/context/ReservationsContext.jsx
@@ -0,0 +1,113 @@
+import {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+} from 'react'
+
+const STORAGE_KEY = 'librairie-reservations'
+
+function loadReservations() {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (raw === null) return []
+    const parsed = JSON.parse(raw)
+    return Array.isArray(parsed) ? parsed : []
+  } catch {
+    return []
+  }
+}
+
+function saveReservations(items) {
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(items))
+}
+
+const ReservationsContext = createContext(null)
+
+export function ReservationsProvider({ children }) {
+  const [reservations, setReservations] = useState(loadReservations)
+
+  useEffect(() => {
+    saveReservations(reservations)
+  }, [reservations])
+
+  /** Équivalent local de POST /api/books/:id/reservations */
+  const createReservation = useCallback((book) => {
+    const bookId = String(book?.id || '')
+    if (!bookId) throw new Error('Livre invalide')
+    setReservations((prev) => {
+      const already = prev.some((r) => r.bookId === bookId && !r.returnedAt)
+      if (already) return prev
+      return [
+        ...prev,
+        {
+          id: crypto.randomUUID(),
+          bookId,
+          title: String(book.title || ''),
+          author: String(book.author || ''),
+          createdAt: new Date().toISOString(),
+          returnedAt: null,
+        },
+      ]
+    })
+  }, [])
+
+  /** Équivalent local de POST /api/returns */
+  const registerReturn = useCallback((reservationId) => {
+    const rid = String(reservationId || '')
+    setReservations((prev) => {
+      const target = prev.find((r) => r.id === rid && !r.returnedAt)
+      if (!target) return prev
+      return prev.map((r) =>
+        r.id === rid
+          ? { ...r, returnedAt: new Date().toISOString() }
+          : r,
+      )
+    })
+  }, [])
+
+  const activeReservations = useMemo(
+    () => reservations.filter((r) => !r.returnedAt),
+    [reservations],
+  )
+
+  const hasActiveReservationForBook = useCallback(
+    (bookId) =>
+      reservations.some((r) => r.bookId === String(bookId) && !r.returnedAt),
+    [reservations],
+  )
+
+  const value = useMemo(
+    () => ({
+      reservations,
+      activeReservations,
+      createReservation,
+      registerReturn,
+      hasActiveReservationForBook,
+    }),
+    [
+      reservations,
+      activeReservations,
+      createReservation,
+      registerReturn,
+      hasActiveReservationForBook,
+    ],
+  )
+
+  return (
+    <ReservationsContext.Provider value={value}>
+      {children}
+    </ReservationsContext.Provider>
+  )
+}
+
+// eslint-disable-next-line react-refresh/only-export-components
+export function useReservations() {
+  const ctx = useContext(ReservationsContext)
+  if (!ctx) {
+    throw new Error('useReservations doit être utilisé dans un ReservationsProvider')
+  }
+  return ctx
+}
diff --git a/src/context/ReviewsContext.jsx b/src/context/ReviewsContext.jsx
new file mode 100644
index 0000000..16bb7d6
--- /dev/null
+++ b/src/context/ReviewsContext.jsx
@@ -0,0 +1,85 @@
+import {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+} from 'react'
+
+const STORAGE_KEY = 'librairie-reviews'
+
+function loadReviews() {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (raw === null) return []
+    const parsed = JSON.parse(raw)
+    return Array.isArray(parsed) ? parsed : []
+  } catch {
+    return []
+  }
+}
+
+function saveReviews(items) {
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(items))
+}
+
+const ReviewsContext = createContext(null)
+
+export function ReviewsProvider({ children }) {
+  const [reviews, setReviews] = useState(loadReviews)
+
+  useEffect(() => {
+    saveReviews(reviews)
+  }, [reviews])
+
+  /** Équivalent local de POST /api/books/:id/reviews */
+  const addReview = useCallback((bookId, payload) => {
+    const bid = String(bookId || '')
+    if (!bid) throw new Error('Livre invalide')
+    const comment = String(payload?.comment || '').trim()
+    const rating = Math.min(5, Math.max(1, Math.trunc(Number(payload?.rating) || 0)))
+    if (!comment) throw new Error('Écris un avis.')
+    if (!Number.isFinite(rating) || rating < 1) {
+      throw new Error('Choisis une note entre 1 et 5.')
+    }
+    setReviews((prev) => [
+      ...prev,
+      {
+        id: crypto.randomUUID(),
+        bookId: bid,
+        comment,
+        rating,
+        createdAt: new Date().toISOString(),
+      },
+    ])
+  }, [])
+
+  const getReviewsForBook = useCallback(
+    (bookId) => {
+      const bid = String(bookId || '')
+      return reviews
+        .filter((r) => r.bookId === bid)
+        .sort((a, b) => String(b.createdAt).localeCompare(String(a.createdAt)))
+    },
+    [reviews],
+  )
+
+  const value = useMemo(
+    () => ({ reviews, addReview, getReviewsForBook }),
+    [reviews, addReview, getReviewsForBook],
+  )
+
+  return (
+    <ReviewsContext.Provider value={value}>{children}</ReviewsContext.Provider>
+  )
+}
+
+// eslint-disable-next-line react-refresh/only-export-components
+export function useReviews() {
+  const ctx = useContext(ReviewsContext)
+  if (!ctx) {
+    throw new Error('useReviews doit être utilisé dans un ReviewsProvider')
+  }
+  return ctx
+}
diff --git a/src/layout/RootLayout.jsx b/src/layout/RootLayout.jsx
index 8d3d2e8..6ffc161 100644
--- a/src/layout/RootLayout.jsx
+++ b/src/layout/RootLayout.jsx
@@ -31,6 +31,30 @@ export function RootLayout() {
             >
               Recherche (Axios)
             </NavLink>
+            <NavLink
+              to="/commande"
+              className={({ isActive }) =>
+                isActive ? 'nav-link active' : 'nav-link'
+              }
+            >
+              Commande
+            </NavLink>
+            <NavLink
+              to="/promotions"
+              className={({ isActive }) =>
+                isActive ? 'nav-link active' : 'nav-link'
+              }
+            >
+              Promotions
+            </NavLink>
+            <NavLink
+              to="/retours"
+              className={({ isActive }) =>
+                isActive ? 'nav-link active' : 'nav-link'
+              }
+            >
+              Retours
+            </NavLink>
           </nav>
         </div>
       </header>
diff --git a/src/main.jsx b/src/main.jsx
index 25774ae..94c3163 100644
--- a/src/main.jsx
+++ b/src/main.jsx
@@ -2,15 +2,27 @@ import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
 import { BrowserRouter } from 'react-router-dom'
 import { BooksProvider } from './context/BooksContext.jsx'
+import { OrdersProvider } from './context/OrdersContext.jsx'
+import { PromotionsProvider } from './context/PromotionsContext.jsx'
+import { ReservationsProvider } from './context/ReservationsContext.jsx'
+import { ReviewsProvider } from './context/ReviewsContext.jsx'
 import App from './App.jsx'
 import './index.css'
 
 createRoot(document.getElementById('root')).render(
   <StrictMode>
     <BrowserRouter>
-      <BooksProvider>
-        <App />
-      </BooksProvider>
+      <PromotionsProvider>
+        <OrdersProvider>
+          <BooksProvider>
+            <ReservationsProvider>
+              <ReviewsProvider>
+                <App />
+              </ReviewsProvider>
+            </ReservationsProvider>
+          </BooksProvider>
+        </OrdersProvider>
+      </PromotionsProvider>
     </BrowserRouter>
   </StrictMode>,
 )
diff --git a/src/pages/BookDetailPage.jsx b/src/pages/BookDetailPage.jsx
index 90379bd..88c75fb 100644
--- a/src/pages/BookDetailPage.jsx
+++ b/src/pages/BookDetailPage.jsx
@@ -1,12 +1,41 @@
+import { useState } from 'react'
 import { Link, useNavigate, useParams } from 'react-router-dom'
 import { useBooks } from '../context/BooksContext.jsx'
+import { useReservations } from '../context/ReservationsContext.jsx'
+import { useReviews } from '../context/ReviewsContext.jsx'
+
+function formatDate(iso) {
+  try {
+    return new Intl.DateTimeFormat('fr-FR', {
+      dateStyle: 'short',
+      timeStyle: 'short',
+    }).format(new Date(iso))
+  } catch {
+    return iso || '—'
+  }
+}
 
 export default function BookDetailPage() {
   const { id } = useParams()
   const navigate = useNavigate()
   const { books, toggleRead, removeBook } = useBooks()
+  const {
+    createReservation,
+    hasActiveReservationForBook,
+  } = useReservations()
+  const { addReview, getReviewsForBook } = useReviews()
   const book = books.find((b) => b.id === id)
 
+  const [resMsg, setResMsg] = useState(null)
+  const [resErr, setResErr] = useState(null)
+  const [reviewRating, setReviewRating] = useState(5)
+  const [reviewComment, setReviewComment] = useState('')
+  const [reviewErr, setReviewErr] = useState(null)
+  const [reviewOk, setReviewOk] = useState(null)
+
+  const bookReviews = book ? getReviewsForBook(book.id) : []
+  const reserved = book ? hasActiveReservationForBook(book.id) : false
+
   if (!book) {
     return (
       <div className="book-detail">
@@ -23,6 +52,44 @@ export default function BookDetailPage() {
     navigate('/')
   }
 
+  function handleReserve() {
+    setResErr(null)
+    setResMsg(null)
+    if (hasActiveReservationForBook(book.id)) {
+      setResErr('Ce livre a déjà une réservation en cours.')
+      return
+    }
+    try {
+      createReservation({
+        id: book.id,
+        title: book.title,
+        author: book.author,
+      })
+      setResMsg(
+        'Réservation enregistrée (équivalent local POST /api/books/:id/reservations). Va voir aussi la page Retours.',
+      )
+    } catch (e) {
+      setResErr(e?.message || 'Erreur réservation.')
+    }
+  }
+
+  function handleSubmitReview(e) {
+    e.preventDefault()
+    setReviewErr(null)
+    setReviewOk(null)
+    try {
+      addReview(book.id, {
+        rating: reviewRating,
+        comment: reviewComment,
+      })
+      setReviewOk('Avis publié (équivalent local POST /api/books/:id/reviews).')
+      setReviewComment('')
+      setReviewRating(5)
+    } catch (err) {
+      setReviewErr(err?.message || 'Impossible de publier l’avis.')
+    }
+  }
+
   return (
     <article className="book-detail">
       <Link to="/" className="nav-link book-detail-back">
@@ -31,6 +98,11 @@ export default function BookDetailPage() {
       <span className={`badge ${book.read ? 'read' : 'unread'}`}>
         {book.read ? 'Lu' : 'À lire'}
       </span>
+      {reserved ? (
+        <span className="badge unread" title="Une réservation est en cours pour ce titre">
+          Réservé
+        </span>
+      ) : null}
       <h2 className="book-detail-title">{book.title}</h2>
       <p className="book-detail-author">{book.author}</p>
       <dl className="book-detail-meta">
@@ -38,6 +110,10 @@ export default function BookDetailPage() {
           <dt>Année</dt>
           <dd>{book.year}</dd>
         </div>
+        <div>
+          <dt>Prix</dt>
+          <dd>{Number(book.price ?? 10).toFixed(2)} €</dd>
+        </div>
         {book.genre ? (
           <div>
             <dt>Genre</dt>
@@ -51,6 +127,87 @@ export default function BookDetailPage() {
           </dd>
         </div>
       </dl>
+
+      <section className="book-section">
+        <h3 className="book-section-title">Réserver ce livre</h3>
+        <p className="book-section-lead">
+          <code>POST /api/books/:id/reservations</code> en local uniquement (
+          <code>librairie-reservations</code>).
+        </p>
+        {resErr ? (
+          <p className="form-error" role="alert">
+            {resErr}
+          </p>
+        ) : null}
+        {resMsg ? <p className="form-notice">{resMsg}</p> : null}
+        <button
+          type="button"
+          className="btn primary"
+          onClick={handleReserve}
+          disabled={reserved}
+        >
+          {reserved ? 'Déjà réservé (en cours)' : 'Réserver (POST)'}
+        </button>
+        <Link to="/retours" className="nav-link book-section-link">
+          Gérer les retours →
+        </Link>
+      </section>
+
+      <section className="book-section">
+        <h3 className="book-section-title">Avis des lecteurs</h3>
+        <p className="book-section-lead">
+          <code>POST /api/books/:id/reviews</code> en local (
+          <code>librairie-reviews</code>).
+        </p>
+        {reviewErr ? (
+          <p className="form-error" role="alert">
+            {reviewErr}
+          </p>
+        ) : null}
+        {reviewOk ? <p className="form-notice">{reviewOk}</p> : null}
+        <form className="review-form" onSubmit={handleSubmitReview}>
+          <label>
+            Note (1 à 5)
+            <select
+              value={reviewRating}
+              onChange={(e) => setReviewRating(Number(e.target.value))}
+            >
+              {[1, 2, 3, 4, 5].map((n) => (
+                <option key={n} value={n}>
+                  {n}
+                </option>
+              ))}
+            </select>
+          </label>
+          <label>
+            Ton avis
+            <textarea
+              rows={3}
+              value={reviewComment}
+              onChange={(e) => setReviewComment(e.target.value)}
+              placeholder="Ce que tu as pensé du livre…"
+            />
+          </label>
+          <button type="submit" className="btn primary">
+            Publier l’avis (POST)
+          </button>
+        </form>
+        {bookReviews.length === 0 ? (
+          <p className="empty-state book-reviews-empty">Pas encore d’avis.</p>
+        ) : (
+          <ul className="reviews-list">
+            {bookReviews.map((r) => (
+              <li key={r.id} className="reviews-item">
+                <p className="reviews-meta">
+                  <strong>{r.rating}/5</strong> · {formatDate(r.createdAt)}
+                </p>
+                <p className="reviews-text">{r.comment}</p>
+              </li>
+            ))}
+          </ul>
+        )}
+      </section>
+
       <div className="book-detail-actions">
         <button
           type="button"
diff --git a/src/pages/CommandePage.jsx b/src/pages/CommandePage.jsx
new file mode 100644
index 0000000..f00c76e
--- /dev/null
+++ b/src/pages/CommandePage.jsx
@@ -0,0 +1,211 @@
+import { useMemo, useState } from 'react'
+import { useBooks } from '../context/BooksContext.jsx'
+import { useOrders } from '../context/OrdersContext.jsx'
+import { usePromotions } from '../context/PromotionsContext.jsx'
+
+function formatEUR(amount) {
+  const n = Number(amount) || 0
+  return new Intl.NumberFormat('fr-FR', {
+    style: 'currency',
+    currency: 'EUR',
+    maximumFractionDigits: 2,
+  }).format(n)
+}
+
+function toQtyMap(items) {
+  const map = new Map()
+  for (const it of items) map.set(it.bookId, it.qty)
+  return map
+}
+
+export default function CommandePage() {
+  const { books } = useBooks()
+  const { createOrder } = useOrders()
+  const { getActivePromotionByCode, normalizeCode } = usePromotions()
+
+  const [qtyByBookId, setQtyByBookId] = useState(() => ({}))
+  const [promoInput, setPromoInput] = useState('')
+  const [notice, setNotice] = useState(null)
+  const [error, setError] = useState(null)
+
+  const items = useMemo(() => {
+    return books
+      .map((b) => {
+        const qty = Math.max(0, Math.trunc(Number(qtyByBookId[b.id]) || 0))
+        const unitPrice = Number(b.price)
+        return {
+          bookId: b.id,
+          title: b.title,
+          unitPrice: Number.isFinite(unitPrice) ? unitPrice : 10,
+          qty,
+        }
+      })
+      .filter((it) => it.qty > 0)
+  }, [books, qtyByBookId])
+
+  const subtotal = useMemo(() => {
+    return items.reduce((sum, it) => sum + it.unitPrice * it.qty, 0)
+  }, [items])
+
+  const promo = useMemo(() => {
+    const code = normalizeCode(promoInput)
+    if (!code) return null
+    return getActivePromotionByCode(code)
+  }, [promoInput, getActivePromotionByCode, normalizeCode])
+
+  const discount = useMemo(() => {
+    if (!promo) return 0
+    return (subtotal * promo.value) / 100
+  }, [promo, subtotal])
+
+  const total = useMemo(
+    () => Math.max(0, subtotal - discount),
+    [subtotal, discount],
+  )
+
+  function setQty(bookId, nextQty) {
+    setQtyByBookId((prev) => ({ ...prev, [bookId]: nextQty }))
+  }
+
+  function handleSubmit() {
+    setError(null)
+    setNotice(null)
+    try {
+      const order = createOrder({
+        items,
+        promotion: promo
+          ? { code: promo.code, type: promo.type, value: promo.value }
+          : null,
+      })
+      setQtyByBookId({})
+      setPromoInput('')
+      const map = toQtyMap(order.items)
+      setNotice(
+        `Commande ${order.id.slice(0, 8)} créée (${map.size} livre${
+          map.size > 1 ? 's' : ''
+        }). Total: ${formatEUR(order.total)}.`,
+      )
+    } catch (e) {
+      setError(e?.message || 'Impossible de créer la commande.')
+    }
+  }
+
+  return (
+    <div className="commande-page">
+      <h2 className="page-title">Passer une commande</h2>
+      <p className="page-lead">
+        Équivalent local de <code>POST /api/orders</code> (aucun backend).
+      </p>
+
+      {error ? (
+        <p className="form-error" role="alert">
+          {error}
+        </p>
+      ) : null}
+      {notice ? <p className="form-notice">{notice}</p> : null}
+
+      {books.length === 0 ? (
+        <p className="empty-state">
+          Aucun livre dans le catalogue. Ajoute un livre dans “Mes livres”
+          d’abord.
+        </p>
+      ) : (
+        <div className="order-grid">
+          <section className="order-panel">
+            <h3 className="panel-title">Catalogue</h3>
+            <ul className="order-catalog">
+              {books.map((b) => (
+                <li key={b.id} className="order-catalog-item">
+                  <div className="order-catalog-main">
+                    <div>
+                      <p className="order-book-title">{b.title}</p>
+                      <p className="order-book-meta">
+                        {b.author} · {formatEUR(b.price ?? 10)}
+                      </p>
+                    </div>
+                    <label className="qty">
+                      <span className="qty-label">Qté</span>
+                      <input
+                        type="number"
+                        min={0}
+                        step={1}
+                        value={qtyByBookId[b.id] ?? 0}
+                        onChange={(e) => setQty(b.id, e.target.value)}
+                        aria-label={`Quantité pour ${b.title}`}
+                      />
+                    </label>
+                  </div>
+                </li>
+              ))}
+            </ul>
+          </section>
+
+          <aside className="order-panel">
+            <h3 className="panel-title">Récapitulatif</h3>
+            {items.length === 0 ? (
+              <p className="empty-state">
+                Sélectionne au moins un livre (quantité &gt; 0).
+              </p>
+            ) : (
+              <ul className="order-summary">
+                {items.map((it) => (
+                  <li key={it.bookId} className="order-summary-item">
+                    <span>
+                      {it.title} × {it.qty}
+                    </span>
+                    <span>{formatEUR(it.unitPrice * it.qty)}</span>
+                  </li>
+                ))}
+              </ul>
+            )}
+
+            <div className="promo-box">
+              <label className="promo-label">
+                Code promo
+                <input
+                  className="promo-input"
+                  placeholder="Ex. BUT10"
+                  value={promoInput}
+                  onChange={(e) => setPromoInput(e.target.value)}
+                />
+              </label>
+              <p className="promo-hint">
+                Équivalent local de <code>POST /api/promotions</code> (créées dans
+                “Promotions”).
+              </p>
+              {promoInput.trim() && !promo ? (
+                <p className="promo-warn">Code invalide ou inactif.</p>
+              ) : null}
+              {promo ? (
+                <p className="promo-ok">
+                  Promo appliquée : <strong>{promo.code}</strong> (−{promo.value}
+                  %)
+                </p>
+              ) : null}
+            </div>
+
+            <div className="totals">
+              <div className="totals-row">
+                <span>Sous-total</span>
+                <span>{formatEUR(subtotal)}</span>
+              </div>
+              <div className="totals-row">
+                <span>Remise</span>
+                <span>−{formatEUR(discount)}</span>
+              </div>
+              <div className="totals-row total">
+                <span>Total</span>
+                <span>{formatEUR(total)}</span>
+              </div>
+            </div>
+
+            <button type="button" className="btn primary" onClick={handleSubmit}>
+              Passer commande (POST)
+            </button>
+          </aside>
+        </div>
+      )}
+    </div>
+  )
+}
+
diff --git a/src/pages/PromotionsPage.jsx b/src/pages/PromotionsPage.jsx
new file mode 100644
index 0000000..b931cc0
--- /dev/null
+++ b/src/pages/PromotionsPage.jsx
@@ -0,0 +1,118 @@
+import { useMemo, useState } from 'react'
+import { usePromotions } from '../context/PromotionsContext.jsx'
+
+export default function PromotionsPage() {
+  const { promotions, createPromotion, removePromotion, setPromotionActive } =
+    usePromotions()
+
+  const [code, setCode] = useState('')
+  const [value, setValue] = useState(10)
+  const [notice, setNotice] = useState(null)
+  const [error, setError] = useState(null)
+
+  const sorted = useMemo(() => {
+    return [...promotions].sort((a, b) => {
+      if (a.active !== b.active) return a.active ? -1 : 1
+      return String(a.code).localeCompare(String(b.code))
+    })
+  }, [promotions])
+
+  function handleSubmit(e) {
+    e.preventDefault()
+    setError(null)
+    setNotice(null)
+    try {
+      createPromotion({ code, value })
+      setNotice('Promotion créée.')
+      setCode('')
+      setValue(10)
+    } catch (err) {
+      setError(err?.message || 'Impossible de créer la promotion.')
+    }
+  }
+
+  return (
+    <div className="promotions-page">
+      <h2 className="page-title">Promotions</h2>
+      <p className="page-lead">
+        Équivalent local de <code>POST /api/promotions</code> (aucun backend).
+      </p>
+
+      {error ? (
+        <p className="form-error" role="alert">
+          {error}
+        </p>
+      ) : null}
+      {notice ? <p className="form-notice">{notice}</p> : null}
+
+      <div className="promo-grid">
+        <section className="order-panel">
+          <h3 className="panel-title">Créer une promotion</h3>
+          <form className="promo-form" onSubmit={handleSubmit}>
+            <label>
+              Code
+              <input
+                value={code}
+                onChange={(e) => setCode(e.target.value)}
+                placeholder="Ex. BUT10"
+              />
+            </label>
+            <label>
+              Remise (%)
+              <input
+                type="number"
+                min={1}
+                max={90}
+                value={value}
+                onChange={(e) => setValue(Number(e.target.value) || 0)}
+              />
+            </label>
+            <button type="submit" className="btn primary">
+              Créer (POST)
+            </button>
+          </form>
+          <p className="promo-hint">
+            Astuce : le code est normalisé (majuscules, sans espaces).
+          </p>
+        </section>
+
+        <section className="order-panel">
+          <h3 className="panel-title">Promotions existantes</h3>
+          {sorted.length === 0 ? (
+            <p className="empty-state">Aucune promotion créée.</p>
+          ) : (
+            <ul className="promo-list">
+              {sorted.map((p) => (
+                <li key={p.id} className="promo-item">
+                  <div className="promo-item-main">
+                    <div>
+                      <p className="promo-code">{p.code}</p>
+                      <p className="promo-meta">−{p.value}%</p>
+                    </div>
+                    <div className="promo-actions">
+                      <button
+                        type="button"
+                        className="btn small"
+                        onClick={() => setPromotionActive(p.code, !p.active)}
+                      >
+                        {p.active ? 'Désactiver' : 'Activer'}
+                      </button>
+                      <button
+                        type="button"
+                        className="btn small danger"
+                        onClick={() => removePromotion(p.code)}
+                      >
+                        Supprimer
+                      </button>
+                    </div>
+                  </div>
+                </li>
+              ))}
+            </ul>
+          )}
+        </section>
+      </div>
+    </div>
+  )
+}
+
diff --git a/src/pages/RetoursPage.jsx b/src/pages/RetoursPage.jsx
new file mode 100644
index 0000000..eda56ca
--- /dev/null
+++ b/src/pages/RetoursPage.jsx
@@ -0,0 +1,97 @@
+import { useState } from 'react'
+import { Link } from 'react-router-dom'
+import { useReservations } from '../context/ReservationsContext.jsx'
+
+function formatDate(iso) {
+  if (!iso) return '—'
+  try {
+    return new Intl.DateTimeFormat('fr-FR', {
+      dateStyle: 'short',
+      timeStyle: 'short',
+    }).format(new Date(iso))
+  } catch {
+    return iso
+  }
+}
+
+export default function RetoursPage() {
+  const { activeReservations, reservations, registerReturn } = useReservations()
+  const [notice, setNotice] = useState(null)
+
+  const returned = reservations
+    .filter((r) => r.returnedAt)
+    .sort((a, b) =>
+      String(b.returnedAt).localeCompare(String(a.returnedAt)),
+    )
+
+  function handleReturn(id) {
+    setNotice(null)
+    registerReturn(id)
+    setNotice('Retour enregistré (équivalent local POST /api/returns).')
+  }
+
+  return (
+    <div className="retours-page">
+      <h2 className="page-title">Retours (admin fictif)</h2>
+      <p className="page-lead">
+        Ici tu gères les réservations encore “sorties”. Rien sur le backend :
+        tout vit dans{' '}
+        <code>localStorage</code> (<code>librairie-reservations</code>).
+      </p>
+
+      {notice ? <p className="form-notice">{notice}</p> : null}
+
+      <section className="order-panel retours-panel">
+        <h3 className="panel-title">Réservations en cours</h3>
+        {activeReservations.length === 0 ? (
+          <p className="empty-state">Aucune réservation à retourner.</p>
+        ) : (
+          <ul className="retours-list">
+            {activeReservations.map((r) => (
+              <li key={r.id} className="retours-item">
+                <div>
+                  <p className="retours-book">
+                    <Link to={`/${r.bookId}`}>{r.title || 'Sans titre'}</Link>
+                  </p>
+                  <p className="retours-meta">
+                    {r.author} · réservé le {formatDate(r.createdAt)}
+                  </p>
+                  <p className="retours-id">
+                    <code>{r.id.slice(0, 8)}…</code>
+                  </p>
+                </div>
+                <button
+                  type="button"
+                  className="btn primary small"
+                  onClick={() => handleReturn(r.id)}
+                >
+                  Enregistrer le retour
+                </button>
+              </li>
+            ))}
+          </ul>
+        )}
+      </section>
+
+      <section className="order-panel retours-panel">
+        <h3 className="panel-title">Historique des retours</h3>
+        {returned.length === 0 ? (
+          <p className="empty-state">Aucun retour enregistré pour l’instant.</p>
+        ) : (
+          <ul className="retours-list history">
+            {returned.slice(0, 20).map((r) => (
+              <li key={r.id} className="retours-item muted">
+                <div>
+                  <p className="retours-book">{r.title}</p>
+                  <p className="retours-meta">
+                    Retour le {formatDate(r.returnedAt)}
+                  </p>
+                </div>
+              </li>
+            ))}
+          </ul>
+        )}
+      </section>
+    </div>
+  )
+}
diff --git a/src/pages/SearchPage.jsx b/src/pages/SearchPage.jsx
index e158f6b..1897229 100644
--- a/src/pages/SearchPage.jsx
+++ b/src/pages/SearchPage.jsx
@@ -15,6 +15,7 @@ function docToBookPayload(doc) {
         ? doc.first_publish_year
         : new Date().getFullYear(),
     genre: Array.isArray(doc.subject) ? doc.subject[0] : '',
+    price: 10,
     read: false,
   }
 }