diff --git a/library/quickadd/__pycache__/app.cpython-313.pyc b/library/quickadd/__pycache__/app.cpython-313.pyc
new file mode 100644
index 0000000..2b023ab
Binary files /dev/null and b/library/quickadd/__pycache__/app.cpython-313.pyc differ
diff --git a/library/quickadd/app.py b/library/quickadd/app.py
index 3d4ad68..eb74e25 100644
--- a/library/quickadd/app.py
+++ b/library/quickadd/app.py
@@ -731,6 +731,167 @@ def op_search(term):
         "year": b.get("copyright_date") or "", "copies": by_bib.get(b["biblio_id"], [])} for b in biblios]}
 
 
+# ------------------------------------------------------------ library / book page
+PAGE_SIZE = 48
+ITEM_FILTER_CAP = 2000
+
+
+def _shape_book(b, items, where):
+    mine = [i for i in items if i["biblio_id"] == b["biblio_id"]]
+    out = sum(1 for i in mine if item_status(i) == "Checked out")
+    shelves = sorted({where.get(i.get("location"), "") for i in mine} - {""})
+    return {"id": b["biblio_id"], "title": (b.get("title") or "").rstrip(" /:"), "author": b.get("author") or "",
+            "year": b.get("copyright_date") or "", "isbn": b.get("isbn") or "", "type": b.get("item_type") or "",
+            "copies": len(mine), "out": out, "shelves": shelves,
+            "callnumber": next((i.get("callnumber") for i in mine if i.get("callnumber")), "") or ""}
+
+
+def op_library(qs):
+    """The Library grid: filter by shelf / format / status, search, sort, page."""
+    def one(k):
+        return (qs.get(k) or [""])[0]
+    term = re.sub(r"[%_\\]", "", one("q")).strip()[:80]
+    shelf, itype, status = one("shelf"), one("type"), one("status")
+    sort = one("sort") or "title"
+    try:
+        page = max(1, int(one("page") or 1))
+    except ValueError:
+        page = 1
+    conds = []
+    if term:
+        like = {"-like": "%" + term + "%"}
+        conds.append({"-or": [{"title": like}, {"author": like}, {"isbn": like}, {"ean": like}]})
+    order = {"title": "title", "author": "author", "new": "-biblio_id"}.get(sort, "title")
+    item_q = {}
+    if shelf == "-":
+        item_q["location"] = None
+    elif shelf:
+        item_q["location"] = shelf
+    if itype:
+        item_q["item_type_id"] = itype
+    if status == "out":
+        item_q["checked_out_date"] = {"!=": None}
+    elif status == "in":
+        item_q["checked_out_date"] = None
+    query = {"_order_by": order}
+    if item_q:
+        its = koha("GET", "/items", query={"q": json.dumps(item_q), "_per_page": str(ITEM_FILTER_CAP)}) or []
+        ids = sorted({i["biblio_id"] for i in its})
+        if not ids:
+            return {"books": [], "page": page, "more": False}
+        conds.append({"biblio_id": ids})
+    if conds:
+        query["q"] = json.dumps(conds[0] if len(conds) == 1 else {"-and": conds})
+    query.update({"_per_page": str(PAGE_SIZE + 1), "_page": str(page)})
+    books = koha("GET", "/biblios", query=query) or []
+    more = len(books) > PAGE_SIZE
+    books = books[:PAGE_SIZE]
+    if not books:
+        return {"books": [], "page": page, "more": False}
+    ids = [b["biblio_id"] for b in books]
+    items = koha("GET", "/items", query={"q": json.dumps({"biblio_id": ids}), "_per_page": "1000"}) or []
+    where = {l["value"]: l["label"] for l in get_locations()}
+    return {"books": [_shape_book(b, items, where) for b in books], "page": page, "more": more}
+
+
+def _checkout_info(item_ids, names):
+    """item_id -> {who, due} for items currently out (staff only)."""
+    if not item_ids:
+        return {}
+    cos = koha("GET", "/checkouts", query={"q": json.dumps({"item_id": item_ids}), "_per_page": "100"}) or []
+    out = {}
+    for c in cos:
+        who = ""
+        if names:
+            try:
+                p = koha("GET", "/patrons/%s" % c["patron_id"])
+                who = ("%s %s" % (p.get("firstname") or "", p.get("surname") or "")).strip()
+            except KohaError:
+                pass
+        out[c["item_id"]] = {"who": who, "patron_id": c["patron_id"], "due": (c.get("due_date") or "")[:10],
+                             "checkout_id": c["checkout_id"]}
+    return out
+
+
+def op_book(biblio_id, staff):
+    b = koha("GET", "/biblios/%d" % biblio_id)
+    items = koha("GET", "/biblios/%d/items" % biblio_id) or []
+    where = {l["value"]: l["label"] for l in get_locations()}
+    out = _checkout_info([i["item_id"] for i in items if item_status(i) == "Checked out"], staff)
+    copies = []
+    for i in items:
+        c = {"item_id": i["item_id"], "barcode": i.get("external_id") or "", "callnumber": i.get("callnumber") or "",
+             "shelf": i.get("location") or "", "shelf_label": where.get(i.get("location"), ""),
+             "status": item_status(i), "type": i.get("item_type_id") or ""}
+        if staff and c["status"] == "Checked out":
+            c["out"] = out.get(i["item_id"])
+        copies.append(c)
+    return {"id": b["biblio_id"], "title": (b.get("title") or "").rstrip(" /:"), "subtitle": b.get("subtitle") or "",
+            "author": b.get("author") or "", "year": b.get("copyright_date") or b.get("publication_year") or "",
+            "isbn": b.get("isbn") or "", "publisher": b.get("publisher") or "", "pages": b.get("pages") or "",
+            "edition": b.get("edition_statement") or "", "summary": b.get("abstract") or b.get("notes") or "",
+            "series": b.get("series_title") or "", "type": b.get("item_type") or "", "copies": copies,
+            "shelves": get_locations()}
+
+
+def op_item_update(payload):
+    item_id = payload.get("item_id")
+    if not isinstance(item_id, int):
+        return 400, {"status": "invalid"}
+    with LOCK:
+        it = koha("GET", "/items/%d" % item_id)
+        if "shelf" in payload:
+            it["location"] = valid_location(payload.get("shelf")) or None
+        if "callnumber" in payload:
+            it["callnumber"] = (str(payload.get("callnumber") or "").strip()[:80]) or None
+        # Koha's update route rejects the computed fields the GET adds.
+        for k in [k for k in it if k.startswith("effective_")] + [
+                "checkouts_count", "holds_count", "renewals_count", "localuse", "timestamp", "call_number_sort",
+                "bookable", "extended_subfields"]:
+            it.pop(k, None)
+        koha("PUT", "/biblios/%d/items/%d" % (it["biblio_id"], item_id), it)
+    return 200, {"status": "saved"}
+
+
+def op_item_delete(payload):
+    item_id, biblio_id = payload.get("item_id"), payload.get("biblio_id")
+    if not isinstance(item_id, int) or not isinstance(biblio_id, int):
+        return 400, {"status": "invalid"}
+    return op_undo({"item_id": item_id, "biblio_id": biblio_id})
+
+
+def op_book_delete(payload):
+    biblio_id = payload.get("biblio_id")
+    if not isinstance(biblio_id, int):
+        return 400, {"status": "invalid"}
+    with LOCK:
+        items = koha("GET", "/biblios/%d/items" % biblio_id) or []
+        if any(item_status(i) == "Checked out" for i in items):
+            return 409, {"status": "error", "message": "A copy is checked out - return it first."}
+        for i in items:
+            koha("DELETE", "/items/%d" % i["item_id"])
+            forget(i["item_id"])
+        koha("DELETE", "/biblios/%d" % biblio_id)
+    return 200, {"status": "deleted"}
+
+
+def op_item_copy(payload):
+    """Another copy of a book already in the library (new barcode per the barcode setting)."""
+    biblio_id = payload.get("biblio_id")
+    if not isinstance(biblio_id, int):
+        return 400, {"status": "invalid"}
+    with LOCK:
+        b = koha("GET", "/biblios/%d" % biblio_id)
+        items = koha("GET", "/biblios/%d/items" % biblio_id) or []
+        base = items[0] if items else {}
+        mode = load_settings()["barcode_mode"]
+        if mode == "scan":
+            mode = "auto"           # no scanner step here: number it, or leave it blank in 'none' mode
+        item = add_item(biblio_id, base.get("item_type_id") or valid_type(b.get("item_type")), base.get("callnumber"),
+                        valid_location(payload.get("shelf")) or base.get("location"), mode)
+    return 200, {"status": "added", "item_id": item["item_id"], "barcode": item.get("external_id") or ""}
+
+
 # ------------------------------------------------------------ photo scanning
 MAX_IMAGE = 12 * 1024 * 1024
 ZBAR_TIMEOUT = 20
@@ -888,7 +1049,7 @@ class Handler(BaseHTTPRequestHandler):
         if self.path == "/healthz":
             return self._send(200, b"ok", "text/plain")
         path = self.path.split("?")[0]
-        if not self._guard(need_admin=path not in ("/", "/api/state", "/api/search")):
+        if not self._guard(need_admin=path not in ("/", "/api/state", "/api/search", "/api/library") and not path.startswith("/api/book/")):
             return
         if path == "/":
             return self._send(200, INDEX, "text/html; charset=utf-8")
@@ -902,6 +1063,19 @@ class Handler(BaseHTTPRequestHandler):
                                     "sources": [s.split(":", 1)[0] if s.startswith("z3950") else s for s in SOURCES]})
         if path == "/api/settings":
             return self._send(200, settings_view())
+        if path == "/api/library" or path.startswith("/api/book/"):
+            try:
+                if path == "/api/library":
+                    return self._send(200, dict(op_library(urllib.parse.parse_qs(urllib.parse.urlparse(self.path).query)),
+                                                shelves=get_locations(), types=get_item_types()))
+                m = re.match(r"^/api/book/(\d{1,9})$", path)
+                if not m:
+                    return self._send(404, {"error": "not found"})
+                return self._send(200, op_book(int(m.group(1)), self.role == "admin"))
+            except KohaError as e:
+                return self._send(404 if e.status == 404 else 502, {"status": "error", "message":
+                                  "Koha is not answering yet - try again in a minute." if e.status == 503
+                                  else "Not found." if e.status == 404 else "Failed: %s" % e.body[:120]})
         if path == "/api/search":
             qs = urllib.parse.parse_qs(urllib.parse.urlparse(self.path).query)
             try:
@@ -931,7 +1105,9 @@ class Handler(BaseHTTPRequestHandler):
             payload = json.loads(self.rfile.read(length) or b"{}")
             ops = {"/api/add": op_add, "/api/manual": op_manual, "/api/undo": op_undo,
                    "/api/finish": op_finish, "/api/cancel": op_cancel, "/api/settings": op_settings,
-                   "/api/barcodes/reserve": op_reserve, "/api/barcodes/assign": op_assign}
+                   "/api/barcodes/reserve": op_reserve, "/api/barcodes/assign": op_assign,
+                   "/api/item/update": op_item_update, "/api/item/delete": op_item_delete,
+                   "/api/item/copy": op_item_copy, "/api/book/delete": op_book_delete}
             fn = ops.get(self.path)
             if not fn:
                 return self._send(404, {"error": "not found"})
diff --git a/library/quickadd/index.html b/library/quickadd/index.html
index b813688..5a73fb9 100644
--- a/library/quickadd/index.html
+++ b/library/quickadd/index.html
@@ -3,7 +3,7 @@
 <head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
-<title>Add to library</title>
+<title>Library</title>
 <style>
   :root {
     --bg: #f6f5f1; --card: #ffffff; --ink: #1d2320; --muted: #5b655f; --line: #dcdad2;
@@ -53,6 +53,7 @@
                      background: var(--card); color: var(--ink); min-width: 0; }
   .hit { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 10px 0; }
   .hit .t { font-weight: 700; font-size: 1.05rem; overflow-wrap: anywhere; }
+  a { color: var(--accent); }
   .hit a { color: var(--accent); }
   .copy { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; padding: 6px 0 0; }
   .chip { border-radius: 999px; padding: 1px 10px; font-size: .88rem; font-weight: 600; border: 1px solid var(--line); }
@@ -93,28 +94,70 @@
       border-radius: 8px; background: var(--card); color: var(--ink); }
   details.settings input[type=number] { width: 6em; }
   .result-note { margin-top: 8px; padding: 8px 10px; border-radius: 8px; background: var(--ok-bg); border: 1px solid var(--ok); }
+  .filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 14px; }
+  .filters select { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink); max-width: 100%; }
+  .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 14px 12px; margin: 6px 0 16px; }
+  .tile { display: block; text-decoration: none; color: inherit; }
+  .tile .art { position: relative; aspect-ratio: 2 / 3; border-radius: 6px; overflow: hidden; border: 1px solid var(--line);
+               display: flex; align-items: flex-end; padding: 8px; font-weight: 700; font-size: .88rem; line-height: 1.2;
+               color: #fff; background: var(--tint, #5b6f63); box-shadow: 0 1px 3px rgba(0,0,0,.18); overflow-wrap: anywhere; }
+  .tile .art img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: var(--card); }
+  .tile .art img[hidden] { display: none; }
+  .tile:hover .art, .tile:focus-visible .art { outline: 3px solid var(--accent); outline-offset: 2px; }
+  .tile .tt { margin-top: 6px; font-weight: 600; font-size: .9rem; line-height: 1.25; overflow-wrap: anywhere;
+              display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
+  .tile .aa { color: var(--muted); font-size: .82rem; overflow-wrap: anywhere; }
+  .tile .flag { position: absolute; top: 6px; right: 6px; z-index: 1; font-size: .72rem; padding: 1px 8px; border-radius: 999px;
+                background: var(--warn-bg); color: var(--warn); border: 1px solid var(--warn); font-weight: 700; }
+  .tile .num { position: absolute; top: 6px; left: 6px; z-index: 1; font-size: .72rem; padding: 1px 7px; border-radius: 999px;
+               background: rgba(0,0,0,.65); color: #fff; font-weight: 700; }
+  .bookhead { display: flex; gap: 16px; flex-wrap: wrap; margin: 8px 0 14px; }
+  .bookhead .art { width: 140px; aspect-ratio: 2 / 3; border-radius: 6px; overflow: hidden; border: 1px solid var(--line); position: relative;
+                   background: var(--tint, #5b6f63); color: #fff; font-weight: 700; padding: 10px; display: flex; align-items: flex-end; flex: none; overflow-wrap: anywhere; }
+  .bookhead .art img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: var(--card); }
+  .bookhead .art img[hidden] { display: none; }
+  .bookhead h2 { margin: 0 0 4px; font-size: 1.4rem; }
+  .copybox { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 10px 0; }
+  .copybox .row { display: flex; flex-wrap: wrap; gap: 8px 10px; align-items: center; margin-top: 8px; }
+  .copybox select, .copybox input[type=text] { font: inherit; padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink); min-width: 0; }
+  button.danger { color: var(--bad); border-color: var(--bad); }
   .sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
 </style>
 </head>
 <body>
 <main>
   <header>
-    <h1 id="title">Add to library</h1>
+    <h1 id="title">Library</h1>
     <nav class="tabs" aria-label="Sections">
-      <a id="tab-add" href="#add" class="on">Add books</a>
-      <a id="tab-find" href="#find">Find a book</a>
+      <a id="tab-library" href="#library" class="on">Library</a>
+      <a id="tab-add" href="#add">Add books</a>
       <a id="lnk-staff" class="ext" href="#" target="_blank" rel="noopener">Manage</a>
       <a id="lnk-opac" class="ext" href="#" target="_blank" rel="noopener">Public catalogue</a>
     </nav>
   </header>
 
-  <section id="view-find" hidden>
+  <section id="view-library" hidden>
     <form class="find-form" id="findform" autocomplete="off">
       <label class="sr" for="q">Title, author or ISBN</label>
-      <input id="q" type="search" placeholder="Title, author or ISBN" enterkeyhint="search">
-      <button class="primary" type="submit">Find</button>
+      <input id="q" type="search" placeholder="Search title, author or ISBN" enterkeyhint="search">
+      <button class="primary" type="submit">Search</button>
     </form>
-    <div id="found" aria-live="polite"></div>
+    <div class="filters">
+      <label class="sr" for="f-shelf">Shelf</label><select id="f-shelf"></select>
+      <label class="sr" for="f-type">Format</label><select id="f-type"></select>
+      <label class="sr" for="f-status">Status</label><select id="f-status">
+        <option value="">Any status</option><option value="in">On the shelf</option><option value="out">Checked out</option></select>
+      <label class="sr" for="f-sort">Sort</label><select id="f-sort">
+        <option value="title">Sort: title</option><option value="author">Sort: author</option><option value="new">Sort: newest first</option></select>
+    </div>
+    <div id="libstatus" class="small" aria-live="polite"></div>
+    <div class="grid" id="grid"></div>
+    <div class="actions"><button type="button" id="more" hidden>Show more</button></div>
+  </section>
+
+  <section id="view-book" hidden>
+    <p><a href="#library" id="back">&larr; Back to the library</a></p>
+    <div id="bookbox" aria-live="polite"></div>
   </section>
 
   <section id="view-add">
@@ -459,37 +502,143 @@
   const embedded = location.pathname.startsWith('/add/');
   let viewer = false;                       // the read-only guest login: search only
 
-  // ---- views: Add books / Find a book
-  function showView() {
-    const find = viewer || location.hash === '#find';
-    $('tab-add').hidden = viewer;
-    $('view-add').hidden = find; $('view-find').hidden = !find;
-    $('tab-add').classList.toggle('on', !find); $('tab-find').classList.toggle('on', find);
-    $('title').textContent = find ? 'Find a book' : 'Add to library';
-    document.title = find ? 'Find a book' : 'Add to library';
-    if (find) $('q').focus(); else $('code').focus();
+  // ---- views: Library / Book / Add books
+  const TINTS = ['#5b6f63', '#6b5b73', '#73655b', '#4f6a7a', '#7a5252', '#6a6f3f', '#4a5f7a', '#7a6a3a'];
+  const tint = t => TINTS[[...(t || '')].reduce((n, c) => (n * 31 + c.charCodeAt(0)) % 997, 7) % TINTS.length];
+  function art(b, cls) {
+    const a = el('span', { className: cls || 'art' }, b.title);
+    a.style.setProperty('--tint', tint(b.title));
+    if (b.isbn && /^\d{10,13}$/.test(b.isbn.replace(/\D/g, '').slice(0, 13))) {
+      const img = el('img', { alt: '', hidden: true, loading: 'lazy' });
+      img.onload = () => { if (img.naturalWidth > 1) img.hidden = false; };
+      img.src = 'https://covers.openlibrary.org/b/isbn/' + b.isbn.replace(/\D/g, '').slice(0, 13) + '-M.jpg?default=false';
+      a.append(img);
+    }
+    return a;
   }
-  window.addEventListener('hashchange', showView);
 
-  async function find(term) {
-    const box = $('found');
-    if (term.trim().length < 2) { box.replaceChildren(el('div', { className: 'small' }, 'Type at least two letters.')); return; }
-    box.replaceChildren(el('div', { className: 'small' }, 'Searching…'));
-    let r;
-    try { r = await api('/api/search?q=' + encodeURIComponent(term)); } catch (e) { r = { status: 'error' }; }
-    if (!r.results) { box.replaceChildren(el('div', { className: 'card warn' }, el('div', { className: 'body' }, r.message || 'Search failed.'))); return; }
-    if (!r.results.length) { box.replaceChildren(el('div', { className: 'small' }, 'No matches for "' + term + '".')); return; }
-    box.replaceChildren(...r.results.map(b => el('div', { className: 'hit' },
-      el('div', { className: 't' }, b.title), el('div', { className: 'meta' }, [b.author, b.year].filter(Boolean).join(' · ')),
-      ...(b.copies.length ? b.copies.map(c => el('div', { className: 'copy' },
-          c.barcode ? el('span', { className: 'badge' }, c.barcode) : '',
-          el('span', {}, c.location || 'no shelf set'), c.callnumber ? el('span', { className: 'meta' }, c.callnumber) : '',
-          el('span', { className: 'chip ' + (c.status === 'On shelf' ? 'in' : 'out') }, c.status)))
-        : [el('div', { className: 'small' }, 'No copies recorded.')]),
-      viewer ? '' : el('div', { className: 'small', style: 'margin-top:6px' },
-        el('a', { href: staffRoot() + '/cgi-bin/koha/catalogue/detail.pl?biblionumber=' + b.biblio_id, target: '_blank', rel: 'noopener' }, 'Open full record')))));
+  let libPage = 1, libShelves = [], libLoaded = false;
+  const filters = () => ({ q: $('q').value.trim(), shelf: $('f-shelf').value, type: $('f-type').value,
+                           status: $('f-status').value, sort: $('f-sort').value });
+  const filterQuery = () => { const f = filters(); return Object.entries(f).filter(([, v]) => v).map(([k, v]) => k + '=' + encodeURIComponent(v)).join('&'); };
+
+  function tile(b) {
+    const a = el('a', { className: 'tile', href: '#book/' + b.id });
+    const picture = art(b);
+    if (b.copies > 1) picture.append(el('span', { className: 'num' }, '×' + b.copies));
+    if (!viewer && b.out) picture.append(el('span', { className: 'flag' }, b.out === b.copies ? 'Out' : b.out + ' out'));
+    else if (viewer && b.out === b.copies && b.copies) picture.append(el('span', { className: 'flag' }, 'Out'));
+    a.append(picture, el('div', { className: 'tt' }, b.title), el('div', { className: 'aa' }, b.author));
+    return a;
   }
-  $('findform').onsubmit = ev => { ev.preventDefault(); find($('q').value); };
+
+  let libSeq = 0;
+  async function loadLibrary(reset) {
+    const seq = ++libSeq;           // a newer search makes an older, slower answer irrelevant
+    if (reset) libPage = 1;
+    const grid = $('grid');
+    if (reset) grid.replaceChildren();
+    $('libstatus').textContent = 'Loading…';
+    let r;
+    try { r = await api('/api/library?' + filterQuery() + '&page=' + libPage); } catch (e) { r = {}; }
+    if (seq !== libSeq) return;
+    if (!r.books) { $('libstatus').textContent = r.message || 'Koha is not answering yet - try again in a minute.'; return; }
+    if (!libShelves.length && r.shelves) {
+      libShelves = r.shelves;
+      $('f-shelf').replaceChildren(el('option', { value: '' }, 'Any shelf'), el('option', { value: '-' }, '(no shelf set)'),
+        ...r.shelves.map(l => el('option', { value: l.value }, l.label)));
+      $('f-type').replaceChildren(el('option', { value: '' }, 'Any format'),
+        ...Object.entries(r.types || {}).map(([k, v]) => el('option', { value: k }, v)));
+    }
+    grid.append(...r.books.map(tile));
+    $('more').hidden = !r.more;
+    const shown = grid.children.length;
+    const f = filters();
+    $('libstatus').textContent = shown ? shown + (r.more ? '+' : '') + (shown === 1 ? ' book' : ' books') + (f.q || f.shelf || f.type || f.status ? ' match' : '') :
+      (f.q || f.shelf || f.type || f.status ? 'No books match.' : (viewer ? 'Nothing here yet.' : 'Nothing here yet - open Add books and scan an ISBN.'));
+  }
+  $('more').onclick = () => { libPage += 1; loadLibrary(false); };
+  $('findform').onsubmit = ev => { ev.preventDefault(); loadLibrary(true); };
+  for (const id of ['f-shelf', 'f-type', 'f-status', 'f-sort']) $(id).onchange = () => loadLibrary(true);
+
+  // ---- one book
+  async function loadBook(id) {
+    const box = $('bookbox');
+    box.replaceChildren(el('div', { className: 'small' }, 'Loading…'));
+    let b;
+    try { b = await api('/api/book/' + id); } catch (e) { b = {}; }
+    if (!b.copies) { box.replaceChildren(el('div', { className: 'card warn' }, el('div', { className: 'body' }, b.message || 'Book not found.'))); return; }
+    document.title = b.title;
+    if (b.shelves && b.shelves.length) libShelves = b.shelves;
+    const facts = [b.author, b.year, b.publisher, b.pages, b.edition, b.series].filter(Boolean);
+    const head = el('div', { className: 'bookhead' }, art(b),
+      el('div', { className: 'body' }, el('h2', {}, b.title), b.subtitle ? el('div', { className: 'meta' }, b.subtitle) : '',
+        el('div', { className: 'meta' }, facts.join(' · ')), b.isbn ? el('div', { className: 'small' }, 'ISBN ' + b.isbn) : '',
+        b.summary ? el('p', {}, b.summary) : ''));
+    box.replaceChildren(head);
+    const refresh = () => loadBook(id);
+    for (const c of b.copies) box.append(copyBox(b, c, refresh));
+    if (!b.copies.length) box.append(el('div', { className: 'small' }, 'No copies recorded.'));
+    if (!viewer) {
+      const more = el('button', { type: 'button' }, 'Add another copy');
+      more.onclick = async () => { more.disabled = true; const r = await api('/api/item/copy', { biblio_id: b.id }); if (r.status === 'added') refresh(); else more.disabled = false; };
+      const del = el('button', { type: 'button', className: 'danger' }, 'Delete this book');
+      del.onclick = async () => {
+        if (!confirm('Delete "' + b.title + '" and all its copies from the library?')) return;
+        const r = await api('/api/book/delete', { biblio_id: b.id });
+        if (r.status === 'deleted') location.hash = '#library'; else alert(r.message || 'Could not delete it.');
+      };
+      const full = el('a', { href: staffRoot() + '/cgi-bin/koha/catalogue/detail.pl?biblionumber=' + b.id, target: '_blank', rel: 'noopener' }, 'Open the full record in Koha');
+      box.append(el('div', { className: 'actions' }, more, del), el('p', { className: 'small' }, full, ' (edit title, author and other details there)'));
+    }
+  }
+
+  function copyBox(b, c, refresh) {
+    const box = el('div', { className: 'copybox' });
+    const out = c.status === 'Checked out';
+    const status = el('span', { className: 'chip ' + (c.status === 'On shelf' ? 'in' : 'out') }, c.status +
+      (out && c.out ? (c.out.who ? ' to ' + c.out.who : '') + (c.out.due ? ', due ' + c.out.due : '') : ''));
+    box.append(el('div', {}, c.barcode ? el('span', { className: 'badge' }, c.barcode) : el('span', { className: 'small' }, 'no barcode yet'), ' ', status));
+    if (viewer) {
+      box.append(el('div', { className: 'meta' }, [c.shelf_label || 'no shelf set', c.callnumber && 'Call no. ' + c.callnumber].filter(Boolean).join(' · ')));
+      return box;
+    }
+    const sel = el('select', { 'aria-label': 'Shelf' }, el('option', { value: '' }, '(no shelf set)'),
+      ...libShelves.map(l => el('option', { value: l.value }, l.label)));
+    sel.value = c.shelf;
+    const cn = el('input', { type: 'text', value: c.callnumber, placeholder: 'Call number', 'aria-label': 'Call number', maxLength: 80 });
+    const save = el('button', { type: 'button', className: 'primary' }, 'Save');
+    save.onclick = async () => {
+      save.disabled = true;
+      const r = await api('/api/item/update', { item_id: c.item_id, shelf: sel.value, callnumber: cn.value });
+      save.textContent = r.status === 'saved' ? 'Saved ✓' : 'Failed'; setTimeout(() => { save.textContent = 'Save'; save.disabled = false; }, 1500);
+    };
+    const rm = el('button', { type: 'button', className: 'danger' }, 'Remove copy');
+    rm.disabled = out;
+    rm.onclick = async () => {
+      if (!confirm('Remove this copy' + (c.barcode ? ' (barcode ' + c.barcode + ')' : '') + '?')) return;
+      const r = await api('/api/item/delete', { item_id: c.item_id, biblio_id: b.id });
+      if (r.status === 'undone') { if (b.copies.length <= 1) location.hash = '#library'; else refresh(); }
+    };
+    box.append(el('div', { className: 'row' }, sel, cn, save, rm));
+    return box;
+  }
+
+  function route() {
+    const h = location.hash.replace(/^#/, '');
+    const m = h.match(/^book\/(\d+)$/);
+    let view = m ? 'book' : (h === 'add' && !viewer) ? 'add' : 'library';
+    $('view-library').hidden = view !== 'library'; $('view-book').hidden = view !== 'book'; $('view-add').hidden = view !== 'add';
+    $('tab-library').classList.toggle('on', view !== 'add'); $('tab-add').classList.toggle('on', view === 'add');
+    $('tab-add').hidden = viewer;
+    document.title = view === 'add' ? 'Add books' : (libraryName || 'Library');
+    $('title').textContent = view === 'add' ? 'Add books' : (libraryName || 'Library');
+    if (view === 'book') loadBook(m[1]);
+    else if (view === 'add') $('code').focus();
+    else { if (!libLoaded) { libLoaded = true; loadLibrary(true); } if (h === 'find') $('q').focus(); }
+  }
+  window.addEventListener('hashchange', route);
+  let libraryName = '';
 
   (async () => {
     const s = await api('/api/state');
@@ -514,7 +663,7 @@
     }
     if (!viewer) api('/api/settings').then(applySettings);
     $('earlier').replaceChildren(...s.recent.slice(0, 25).map(e => rowFor(e, false)));
-    showView();
+    route();
   })();
 })();
 </script>