diff --git a/src/components/Settings.tsx b/src/components/Settings.tsx
new file mode 100644
index 0000000..e0a7057
--- /dev/null
+++ b/src/components/Settings.tsx
@@ -0,0 +1,87 @@
+import type { ReactNode } from "react";
+import { useBook } from "../store/useBook";
+import type { TrimSize } from "../model/book";
+import { Icon } from "./Icon";
+
+const TRIMS: { value: TrimSize; label: string }[] = [
+  { value: "6x9", label: "6 × 9 in — trade paperback" },
+  { value: "5.5x8.5", label: "5.5 × 8.5 in — digest" },
+  { value: "5x8", label: "5 × 8 in — pocket" },
+  { value: "a5", label: "A5 — 148 × 210 mm" },
+];
+
+const LANGUAGES = [
+  { value: "en", label: "English" },
+  { value: "es", label: "Spanish" },
+  { value: "fr", label: "French" },
+  { value: "de", label: "German" },
+  { value: "it", label: "Italian" },
+  { value: "pt", label: "Portuguese" },
+];
+
+function Field({ label, children }: { label: string; children: ReactNode }) {
+  return (
+    <label className="field">
+      <span className="field-label">{label}</span>
+      {children}
+    </label>
+  );
+}
+
+export function Settings({ onClose }: { onClose: () => void }) {
+  const metadata = useBook((s) => s.book.metadata);
+  const settings = useBook((s) => s.book.settings);
+  const setMetadata = useBook((s) => s.setMetadata);
+  const setSettings = useBook((s) => s.setSettings);
+
+  return (
+    <div className="overlay" onClick={onClose}>
+      <div className="panel" onClick={(e) => e.stopPropagation()}>
+        <div className="panel-head">
+          <h2>Book setup</h2>
+          <button className="icon-btn" onClick={onClose} title="Close">
+            <Icon d="M6 6l12 12M18 6L6 18" />
+          </button>
+        </div>
+        <div className="panel-body">
+          <Field label="Title">
+            <input value={metadata.title} placeholder="Untitled" onChange={(e) => setMetadata({ title: e.target.value })} />
+          </Field>
+          <Field label="Subtitle">
+            <input value={metadata.subtitle} onChange={(e) => setMetadata({ subtitle: e.target.value })} />
+          </Field>
+          <Field label="Author">
+            <input value={metadata.author} onChange={(e) => setMetadata({ author: e.target.value })} />
+          </Field>
+          <Field label="ISBN">
+            <input value={metadata.isbn} placeholder="optional" onChange={(e) => setMetadata({ isbn: e.target.value })} />
+          </Field>
+          <div className="field-row">
+            <Field label="Trim size">
+              <select value={settings.trim} onChange={(e) => setSettings({ trim: e.target.value as TrimSize })}>
+                {TRIMS.map((t) => (
+                  <option key={t.value} value={t.value}>
+                    {t.label}
+                  </option>
+                ))}
+              </select>
+            </Field>
+            <Field label="Language">
+              <select value={metadata.language} onChange={(e) => setMetadata({ language: e.target.value })}>
+                {LANGUAGES.map((l) => (
+                  <option key={l.value} value={l.value}>
+                    {l.label}
+                  </option>
+                ))}
+              </select>
+            </Field>
+          </div>
+          <label className="check">
+            <input type="checkbox" checked={settings.bleed} onChange={(e) => setSettings({ bleed: e.target.checked })} />
+            Add bleed for full-page images (print)
+          </label>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/store/useBook.ts b/src/store/useBook.ts
index a8fbf2b..01a004e 100644
--- a/src/store/useBook.ts
+++ b/src/store/useBook.ts
@@ -1,6 +1,6 @@
 import { create } from "zustand";
 import type { JSONContent } from "@tiptap/core";
-import { type Book, createChapter, starterBook } from "../model/book";
+import { type Book, type BookMetadata, type BookSettings, createChapter, starterBook } from "../model/book";
 
 interface BookState {
   book: Book;
@@ -11,6 +11,8 @@ interface BookState {
   setChapterContent: (id: string, content: JSONContent) => void;
   setChapterTitle: (id: string, title: string) => void;
   addChapter: () => void;
+  setMetadata: (patch: Partial<BookMetadata>) => void;
+  setSettings: (patch: Partial<BookSettings>) => void;
   replaceBook: (book: Book, path: string) => void;
   markSaved: (path: string) => void;
 }
@@ -48,6 +50,10 @@ export const useBook = create<BookState>((set) => {
           book: { ...s.book, chapters: [...s.book.chapters, chapter] },
         };
       }),
+    setMetadata: (patch) =>
+      set((s) => ({ dirty: true, book: { ...s.book, metadata: { ...s.book.metadata, ...patch } } })),
+    setSettings: (patch) =>
+      set((s) => ({ dirty: true, book: { ...s.book, settings: { ...s.book.settings, ...patch } } })),
     replaceBook: (book, path) =>
       set({ book, activeChapterId: book.chapters[0]?.id ?? "", path, dirty: false }),
     markSaved: (path) => set({ path, dirty: false }),