diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 69c5052..8a70a9e 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -18,7 +18,7 @@ use tauri::{Emitter, Runtime};
 fn build_menu<R: Runtime>(handle: &tauri::AppHandle<R>) -> tauri::Result<Menu<R>> {
     let menu = Menu::default(handle)?;
 
-    let new_book = MenuItemBuilder::with_id("new-book", "New Book")
+    let new_book = MenuItemBuilder::with_id("new-book", "New Project")
         .accelerator("CmdOrCtrl+N")
         .build(handle)?;
     let save = MenuItemBuilder::with_id("save", "Save")
diff --git a/src-tauri/src/library.rs b/src-tauri/src/library.rs
index 1cd497a..5ad2644 100644
--- a/src-tauri/src/library.rs
+++ b/src-tauri/src/library.rs
@@ -16,7 +16,7 @@ pub struct BookSummary {
 fn corrupt_summary(stem: &str) -> BookSummary {
     BookSummary {
         id: stem.to_string(),
-        title: "Unreadable book".to_string(),
+        title: "Unreadable project".to_string(),
         author: String::new(),
         corrupt: true,
         updated_at: 0,
diff --git a/src/components/BackupSettings.tsx b/src/components/BackupSettings.tsx
index 2178a30..dc19520 100644
--- a/src/components/BackupSettings.tsx
+++ b/src/components/BackupSettings.tsx
@@ -141,7 +141,7 @@ export function BackupSettings() {
                         disabled={working || remoteCount === 0}
                         onClick={() => setConfirmRestore(true)}
                       >
-                        {remoteCount === null ? "Restore from Drive" : `Restore ${remoteCount} book${remoteCount === 1 ? "" : "s"}`}
+                        {remoteCount === null ? "Restore from Drive" : `Restore ${remoteCount} project${remoteCount === 1 ? "" : "s"}`}
                       </button>
                     </div>
 
diff --git a/src/components/CoverView.tsx b/src/components/CoverView.tsx
index ad28f12..b34bf2e 100644
--- a/src/components/CoverView.tsx
+++ b/src/components/CoverView.tsx
@@ -72,7 +72,7 @@ export function CoverView() {
                 <Icon d="M4 5h16v14H4zM4 16l4.5-4.5 3 3L16 10l4 4" /> Upload image
               </button>
             </div>
-            <p className="cover-hint">Title, subtitle &amp; author are set in Book setup.</p>
+            <p className="cover-hint">Title, subtitle &amp; author are set in Project setup.</p>
           </>
         )}
         <input
diff --git a/src/components/EditorView.tsx b/src/components/EditorView.tsx
index 8cf0e8b..1ca08fe 100644
--- a/src/components/EditorView.tsx
+++ b/src/components/EditorView.tsx
@@ -285,7 +285,7 @@ export function EditorView() {
             <Icon d={icons.SIDEBAR} />
           </button>
         </div>
-        <button className="doc-title" onClick={() => setSettingsOpen(true)} title="Book setup">
+        <button className="doc-title" onClick={() => setSettingsOpen(true)} title="Project setup">
           {book.metadata.title || "Untitled"}
           {dirty && <span className="dirty-dot" />}
         </button>
@@ -491,7 +491,7 @@ export function EditorView() {
 
       {escArmed && (
         <div className="esc-hint">
-          Press <kbd>Esc</kbd> again for All books
+          Press <kbd>Esc</kbd> again for All projects
         </div>
       )}
 
diff --git a/src/components/ExportPreview.tsx b/src/components/ExportPreview.tsx
index c94d418..011f590 100644
--- a/src/components/ExportPreview.tsx
+++ b/src/components/ExportPreview.tsx
@@ -196,7 +196,7 @@ function ExportPreviewModal() {
           <div className="preview-stage">
             <div className="preview-loading">
               <div className="spinner spinner-dark" />
-              <p>Typesetting your book…</p>
+              <p>Typesetting your project…</p>
             </div>
           </div>
         )}
diff --git a/src/components/FindBar.tsx b/src/components/FindBar.tsx
index 92df5ab..da9eb45 100644
--- a/src/components/FindBar.tsx
+++ b/src/components/FindBar.tsx
@@ -275,7 +275,7 @@ export function FindBar({ editor, open, initialExpanded, onClose }: FindBarProps
               title="Replace All scope"
               onClick={() => setScope((s) => (s === "chapter" ? "book" : "chapter"))}
             >
-              {scope === "chapter" ? "This chapter" : "Whole book"}
+              {scope === "chapter" ? "This chapter" : "Whole project"}
             </button>
           </div>
         )}
diff --git a/src/components/Library.tsx b/src/components/Library.tsx
index 3a7cdee..29135f5 100644
--- a/src/components/Library.tsx
+++ b/src/components/Library.tsx
@@ -71,7 +71,7 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
   const openById = (id: string) =>
     loadBook(id)
       .then(onOpen)
-      .catch((e) => setNotice(`Could not open book: ${e}`));
+      .catch((e) => setNotice(`Could not open project: ${e}`));
 
   const removeBook = async () => {
     if (!pendingDelete) return;
@@ -109,7 +109,7 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
       <div className="shelf">
         <button className="card card-action" onClick={() => createAndOpenBook(onOpen, setNotice)}>
           <Icon d="M12 5v14M5 12h14" size={20} />
-          <span>New book</span>
+          <span>New project</span>
         </button>
         <button className="card card-action" onClick={handleImport} disabled={busy}>
           <Icon d="M12 3v10m0 0l-4-4m4 4l4-4M5 19h14" size={20} />
@@ -126,7 +126,7 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
             <div key={b.id} className="card card-book card-corrupt">
               <span className="card-title">{b.title}</span>
               <span className="card-author">Couldn't be read; a .bak backup may sit beside it.</span>
-              <RowMenu label="Book options" className="card-menu" onDelete={() => setPendingDelete(b)} />
+              <RowMenu label="Project options" className="card-menu" onDelete={() => setPendingDelete(b)} />
             </div>
           ) : (
             <div
@@ -145,7 +145,7 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
               <span className="card-title">{b.title || "Untitled"}</span>
               {b.author && <span className="card-author">{b.author}</span>}
               {b.updatedAt > 0 && <span className="card-meta">Edited {relativeTime(b.updatedAt, now)}</span>}
-              <RowMenu label="Book options" className="card-menu" onDelete={() => setPendingDelete(b)} />
+              <RowMenu label="Project options" className="card-menu" onDelete={() => setPendingDelete(b)} />
             </div>
           ),
         )}
@@ -165,10 +165,10 @@ export function Library({ onOpen }: { onOpen: (book: Book) => void }) {
       )}
       {pendingDelete && (
         <ConfirmDialog
-          title="Delete book"
+          title="Delete project"
           message={
             <>
-              Delete <strong>{pendingDelete.title || "Untitled"}</strong>? This permanently removes the book and all its
+              Delete <strong>{pendingDelete.title || "Untitled"}</strong>? This permanently removes the project and all its
               chapters.
             </>
           }
diff --git a/src/components/MoveChapterDialog.tsx b/src/components/MoveChapterDialog.tsx
index 31fc1e4..fb05343 100644
--- a/src/components/MoveChapterDialog.tsx
+++ b/src/components/MoveChapterDialog.tsx
@@ -50,19 +50,19 @@ export function MoveChapterDialog({ chapter, label, onClose }: MoveChapterDialog
     <div className="overlay" onClick={moving ? undefined : onClose}>
       <div ref={panelRef} className="panel panel-move" onClick={(e) => e.stopPropagation()}>
         <div className="panel-head">
-          <h2>Move to book</h2>
+          <h2>Move to project</h2>
           <button className="icon-btn" onClick={onClose} title="Close">
             <Icon d="M6 6l12 12M18 6L6 18" />
           </button>
         </div>
         <div className="panel-body">
           <p className="confirm-text">
-            Move <strong>{label}</strong> out of this book and into:
+            Move <strong>{label}</strong> out of this project and into:
           </p>
           {books === null ? (
-            <p className="move-empty">Loading books…</p>
+            <p className="move-empty">Loading projects…</p>
           ) : books.length === 0 ? (
-            <p className="move-empty">There is no other book to move this into yet.</p>
+            <p className="move-empty">There is no other project to move this into yet.</p>
           ) : (
             <ul className="move-list">
               {books.map((b) => (
diff --git a/src/components/Settings.tsx b/src/components/Settings.tsx
index bc61907..9a97bdf 100644
--- a/src/components/Settings.tsx
+++ b/src/components/Settings.tsx
@@ -127,7 +127,7 @@ export function Settings({ onClose, onSave }: { onClose: () => void; onSave: ()
     <div className="overlay" onClick={onClose}>
       <div ref={panelRef} className="panel" onClick={(e) => e.stopPropagation()}>
         <div className="panel-head">
-          <h2>Book setup</h2>
+          <h2>Project setup</h2>
           <button className="icon-btn" onClick={onClose} title="Close">
             <Icon d={icons.CLOSE} />
           </button>
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index 95140b6..f051413 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -169,9 +169,9 @@ export function Sidebar({ onNavigate }: { onNavigate?: () => void }) {
 
   return (
     <aside className="sidebar">
-      <button className="brand" onClick={closeBook} title="All books">
+      <button className="brand" onClick={closeBook} title="All projects">
         <Icon d="M14 7l-5 5 5 5" size={15} />
-        <span className="back-label">All books</span>
+        <span className="back-label">All projects</span>
       </button>
       <button
         className="cover-item"