diff --git a/frontend/src/components/maps/InlineTagEditor.jsx b/frontend/src/components/maps/InlineTagEditor.jsx
index 75aab38..8eb8650 100644
--- a/frontend/src/components/maps/InlineTagEditor.jsx
+++ b/frontend/src/components/maps/InlineTagEditor.jsx
@@ -2,17 +2,23 @@ import { useState, useRef, useEffect } from 'react'
 import { useTranslation } from 'react-i18next'
 import { LuX } from 'react-icons/lu'
 
-export default function InlineTagEditor({ tags, onSave, onCancel }) {
+export default function InlineTagEditor({ tags, onSave, onCancel, suggestions = [] }) {
   const { t } = useTranslation()
   const [draft, setDraft] = useState([...tags])
   const [input, setInput] = useState('')
+  const [activeIdx, setActiveIdx] = useState(-1)
   const inputRef = useRef(null)
 
   useEffect(() => { inputRef.current?.focus() }, [])
 
-  const commit = () => {
-    const tag = input.trim().toLowerCase().replace(/,+$/, '')
+  const filtered = input.trim().length > 0
+    ? suggestions.filter(s => s.toLowerCase().includes(input.trim().toLowerCase()) && !draft.includes(s))
+    : []
+
+  const commit = (value) => {
+    const tag = (value ?? input).trim().toLowerCase().replace(/,+$/, '')
     setInput('')
+    setActiveIdx(-1)
     if (tag && !draft.includes(tag)) {
       const next = [...draft, tag]
       setDraft(next)
@@ -27,8 +33,13 @@ export default function InlineTagEditor({ tags, onSave, onCancel }) {
   }
 
   const handleKey = (e) => {
+    if (filtered.length > 0) {
+      if (e.key === 'ArrowDown') { e.preventDefault(); setActiveIdx(i => Math.min(i + 1, filtered.length - 1)); return }
+      if (e.key === 'ArrowUp')   { e.preventDefault(); setActiveIdx(i => Math.max(i - 1, -1)); return }
+      if (e.key === 'Enter' && activeIdx >= 0) { e.preventDefault(); commit(filtered[activeIdx]); return }
+    }
     if (e.key === 'Enter' || e.key === ',') { e.preventDefault(); commit() }
-    else if (e.key === 'Escape') onCancel()
+    else if (e.key === 'Escape') { if (filtered.length > 0) { setInput(''); setActiveIdx(-1) } else onCancel() }
     else if (e.key === 'Backspace' && !input && draft.length > 0) {
       const next = draft.slice(0, -1)
       setDraft(next)
@@ -37,7 +48,7 @@ export default function InlineTagEditor({ tags, onSave, onCancel }) {
   }
 
   return (
-    <div style={{ display: 'flex', flexWrap: 'wrap', gap: 5, alignItems: 'center' }}>
+    <div style={{ display: 'flex', flexWrap: 'wrap', gap: 5, alignItems: 'center', position: 'relative' }}>
       {draft.map(tag => (
         <span key={tag} style={editTagStyle}>
           {tag}
@@ -50,14 +61,37 @@ export default function InlineTagEditor({ tags, onSave, onCancel }) {
           </button>
         </span>
       ))}
-      <input
-        ref={inputRef}
-        value={input}
-        onChange={e => setInput(e.target.value)}
-        onKeyDown={handleKey}
-        placeholder={t('inlineTagEditor.placeholder')}
-        style={{ fontSize: 13, padding: '2px 8px', borderRadius: 10, width: 100, background: 'var(--bg-input)', border: '1px solid var(--border)', color: 'var(--text)' }}
-      />
+      <div style={{ position: 'relative' }}>
+        <input
+          ref={inputRef}
+          value={input}
+          onChange={e => { setInput(e.target.value); setActiveIdx(-1) }}
+          onKeyDown={handleKey}
+          placeholder={t('inlineTagEditor.placeholder')}
+          style={{ fontSize: 13, padding: '2px 8px', borderRadius: 10, width: 120, background: 'var(--bg-input)', border: '1px solid var(--border)', color: 'var(--text)' }}
+        />
+        {filtered.length > 0 && (
+          <div style={{
+            position: 'absolute', top: '100%', left: 0, marginTop: 2, zIndex: 100,
+            background: 'var(--bg-panel)', border: '1px solid var(--border)', borderRadius: 6,
+            boxShadow: '0 4px 12px rgba(0,0,0,0.3)', minWidth: 140, maxHeight: 160, overflowY: 'auto',
+          }}>
+            {filtered.map((s, i) => (
+              <div
+                key={s}
+                onMouseDown={e => { e.preventDefault(); commit(s) }}
+                style={{
+                  padding: '6px 12px', fontSize: 13, cursor: 'pointer',
+                  background: i === activeIdx ? 'var(--bg-card-hover)' : 'transparent',
+                  color: 'var(--text)',
+                }}
+              >
+                {s}
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
       <button onClick={() => { commit(); onCancel() }} style={cancelBtnStyle}>{t('common.done')}</button>
     </div>
   )
diff --git a/frontend/src/components/system/BookEditor.jsx b/frontend/src/components/system/BookEditor.jsx
index 01945ff..e601c6c 100644
--- a/frontend/src/components/system/BookEditor.jsx
+++ b/frontend/src/components/system/BookEditor.jsx
@@ -3,8 +3,9 @@ import { useTranslation } from 'react-i18next'
 import { LuX } from 'react-icons/lu'
 import api from '../../api'
 import InlineTagEditor from '../maps/InlineTagEditor'
+import { saveBookPrefs, getBookPrefs } from '../../hooks/useBookPrefs'
 
-export default function BookEditor({ book, onSave, onClose }) {
+export default function BookEditor({ book, onSave, onClose, allTags = [] }) {
   const { t } = useTranslation()
   const [form, setForm] = useState({
     title:       book.title       || '',
@@ -18,6 +19,8 @@ export default function BookEditor({ book, onSave, onClose }) {
   const [tags, setTags] = useState(book.tags || [])
   const [editingTags, setEditingTags] = useState(false)
   const [saving, setSaving] = useState(false)
+  const [progressReset, setProgressReset] = useState(false)
+  const hasProgress = !!getBookPrefs(book.id).page
 
   const field = (label, key, opts = {}) => (
     <div style={{ marginBottom: 10 }}>
@@ -83,6 +86,7 @@ export default function BookEditor({ book, onSave, onClose }) {
             tags={tags}
             onSave={setTags}
             onCancel={() => setEditingTags(false)}
+            suggestions={allTags.filter(t => !tags.includes(t))}
           />
         ) : (
           <div style={{ display: 'flex', flexWrap: 'wrap', gap: 5, alignItems: 'center' }}>
@@ -98,13 +102,22 @@ export default function BookEditor({ book, onSave, onClose }) {
         )}
       </div>
 
-      <div style={{ display: 'flex', gap: 8 }}>
+      <div style={{ display: 'flex', gap: 8, flexWrap: 'wrap', alignItems: 'center' }}>
         <button onClick={onClose} style={{ padding: '6px 14px', borderRadius: 5, background: 'var(--bg-card)', border: '1px solid var(--border)', color: 'var(--text-dim)', fontSize: 13, cursor: 'pointer' }}>
           {t('bookEditor.cancel')}
         </button>
         <button onClick={handleSave} disabled={saving} style={{ padding: '6px 14px', borderRadius: 5, background: 'var(--gold-dim)', border: 'none', color: 'var(--bg-deep)', fontSize: 13, fontWeight: 600, cursor: 'pointer' }}>
           {saving ? t('bookEditor.saving') : t('bookEditor.save')}
         </button>
+        {(hasProgress || progressReset) && (
+          <button
+            onClick={() => { saveBookPrefs(book.id, { page: null }); setProgressReset(true) }}
+            disabled={progressReset}
+            style={{ marginLeft: 'auto', padding: '6px 14px', borderRadius: 5, background: 'none', border: '1px solid var(--border)', color: progressReset ? 'var(--green)' : 'var(--text-muted)', fontSize: 12, cursor: progressReset ? 'default' : 'pointer' }}
+          >
+            {progressReset ? `✓ ${t('bookEditor.progressReset')}` : t('bookEditor.resetProgress')}
+          </button>
+        )}
       </div>
     </div>
   )
diff --git a/frontend/src/locales/de-DE.json b/frontend/src/locales/de-DE.json
index 092ed13..482c05d 100644
--- a/frontend/src/locales/de-DE.json
+++ b/frontend/src/locales/de-DE.json
@@ -139,7 +139,16 @@
     "addToFavorites": "Zu Favoriten hinzufügen",
     "removeFromFavorites": "Aus Favoriten entfernen",
     "bookmarkPage": "Seite als Lesezeichen speichern",
-    "downloadFile": "Herunterladen"
+    "downloadFile": "Herunterladen",
+    "keyboardShortcuts": "Tastaturkürzel",
+    "shortcutPrevNext": "Vorherige / nächste Seite",
+    "shortcutPrevNextVertical": "Vorherige / nächste Seite (vertikal)",
+    "shortcutFavorite": "Favorit umschalten",
+    "shortcutToc": "Inhaltsverzeichnis",
+    "shortcutBookmarks": "Lesezeichen",
+    "shortcutSearch": "Suche",
+    "shortcutHelp": "Diese Hilfe",
+    "shortcutClose": "Panels schließen"
   },
   "search": {
     "title": "Bibliothek durchsuchen",
@@ -771,7 +780,9 @@
     "save": "Speichern",
     "saving": "Speichern…",
     "cancel": "Abbrechen",
-    "failed": "Speichern fehlgeschlagen."
+    "failed": "Speichern fehlgeschlagen.",
+    "resetProgress": "Lesefortschritt zurücksetzen",
+    "progressReset": "Fortschritt zurückgesetzt"
   },
   "bookRow": {
     "missingFile": "Fehlend",
diff --git a/frontend/src/locales/en-US.json b/frontend/src/locales/en-US.json
index 17ec206..bb764b0 100644
--- a/frontend/src/locales/en-US.json
+++ b/frontend/src/locales/en-US.json
@@ -139,7 +139,16 @@
     "addToFavorites": "Add to favorites",
     "removeFromFavorites": "Remove from favorites",
     "bookmarkPage": "Bookmark this page",
-    "downloadFile": "Download"
+    "downloadFile": "Download",
+    "keyboardShortcuts": "Keyboard Shortcuts",
+    "shortcutPrevNext": "Previous / next page",
+    "shortcutPrevNextVertical": "Previous / next page (vertical)",
+    "shortcutFavorite": "Toggle favorite",
+    "shortcutToc": "Table of contents",
+    "shortcutBookmarks": "Bookmarks",
+    "shortcutSearch": "Search",
+    "shortcutHelp": "This help",
+    "shortcutClose": "Close panels"
   },
   "search": {
     "title": "Search Your Library",
@@ -771,7 +780,9 @@
     "save": "Save",
     "saving": "Saving…",
     "cancel": "Cancel",
-    "failed": "Failed to save."
+    "failed": "Failed to save.",
+    "resetProgress": "Reset reading progress",
+    "progressReset": "Progress reset"
   },
   "bookRow": {
     "missingFile": "Missing",
diff --git a/frontend/src/views/ReaderView.jsx b/frontend/src/views/ReaderView.jsx
index f9faf65..cee7b79 100644
--- a/frontend/src/views/ReaderView.jsx
+++ b/frontend/src/views/ReaderView.jsx
@@ -3,7 +3,7 @@ import { useParams, useNavigate, useSearchParams } from 'react-router-dom'
 import { useTranslation } from 'react-i18next'
 import {
   LuArrowLeft, LuChevronLeft, LuChevronRight, LuDownload,
-  LuFileText, LuColumns2, LuFile, LuSearch, LuList, LuBookmark, LuBookmarkPlus, LuHeart,
+  LuFileText, LuColumns2, LuFile, LuSearch, LuList, LuBookmark, LuBookmarkPlus, LuHeart, LuKeyboard,
 } from 'react-icons/lu'
 import api, { mediaUrl } from '../api'
 import Spinner from '../components/Spinner'
@@ -72,6 +72,7 @@ export default function ReaderView() {
   const [pendingBookmark, setPendingBookmark]     = useState(null)
   const [pendingLabel, setPendingLabel]           = useState('')
   const [pendingNotes, setPendingNotes]           = useState('')
+  const [showShortcuts, setShowShortcuts]         = useState(false)
   const [zoom, setZoom] = useState(1)
   const [pan, setPan]   = useState({ x: 0, y: 0 })
 
@@ -239,6 +240,8 @@ export default function ReaderView() {
       if (e.key === 't') togglePanel('toc')
       if (e.key === 'b') togglePanel('bookmarks')
       if (e.key === 's') togglePanel('search')
+      if (e.key === '?') setShowShortcuts(v => !v)
+      if (e.key === 'Escape') setShowShortcuts(false)
     }
     window.addEventListener('keydown', handleKeyDown)
     return () => window.removeEventListener('keydown', handleKeyDown)
@@ -386,8 +389,42 @@ export default function ReaderView() {
         }}>
           <LuDownload size={13} />
         </a>
+
+        <button
+          onClick={() => setShowShortcuts(v => !v)}
+          title="Keyboard shortcuts (?)"
+          style={{ ...btnStyle, color: showShortcuts ? 'var(--gold)' : 'var(--text-muted)' }}
+        >
+          <LuKeyboard size={14} />
+        </button>
       </div>
 
+      {showShortcuts && (
+        <div
+          onClick={() => setShowShortcuts(false)}
+          style={{ position: 'fixed', inset: 0, background: 'rgba(0,0,0,0.5)', zIndex: 200, display: 'flex', alignItems: 'center', justifyContent: 'center' }}
+        >
+          <div onClick={e => e.stopPropagation()} style={{ background: 'var(--bg-panel)', border: '1px solid var(--border)', borderRadius: 10, padding: 24, minWidth: 280, boxShadow: '0 8px 32px rgba(0,0,0,0.4)' }}>
+            <div style={{ fontSize: 15, fontWeight: 600, marginBottom: 16, color: 'var(--text)' }}>{t('reader.keyboardShortcuts')}</div>
+            {[
+              ['←  /  →', t('reader.shortcutPrevNext')],
+              ['↑  /  ↓', t('reader.shortcutPrevNextVertical')],
+              ['f', t('reader.shortcutFavorite')],
+              ['t', t('reader.shortcutToc')],
+              ['b', t('reader.shortcutBookmarks')],
+              ['s', t('reader.shortcutSearch')],
+              ['?', t('reader.shortcutHelp')],
+              ['Esc', t('reader.shortcutClose')],
+            ].map(([key, desc]) => (
+              <div key={key} style={{ display: 'flex', justifyContent: 'space-between', gap: 24, padding: '5px 0', borderBottom: '1px solid var(--border)', fontSize: 13 }}>
+                <kbd style={{ fontFamily: 'monospace', background: 'var(--bg-card)', border: '1px solid var(--border)', borderRadius: 4, padding: '1px 7px', color: 'var(--gold)', whiteSpace: 'nowrap' }}>{key}</kbd>
+                <span style={{ color: 'var(--text-dim)' }}>{desc}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
       {/* Content + optional sidebar */}
       <div style={{ flex: 1, minHeight: 0, overflow: 'hidden', display: 'flex' }}>
         <div
diff --git a/frontend/src/views/SystemDetailView.jsx b/frontend/src/views/SystemDetailView.jsx
index 71fa9c0..6d6cf84 100644
--- a/frontend/src/views/SystemDetailView.jsx
+++ b/frontend/src/views/SystemDetailView.jsx
@@ -379,6 +379,7 @@ export default function SystemDetailView() {
                           {editingBookId === book.id && (
                             <BookEditor
                               book={book}
+                              allTags={allTags}
                               onSave={(updated) => { saveBook(book.id, updated); setEditingBookId(null) }}
                               onClose={() => setEditingBookId(null)}
                             />
@@ -410,6 +411,7 @@ export default function SystemDetailView() {
                             {editingBookId === book.id && (
                               <BookEditor
                                 book={book}
+                                allTags={allTags}
                                 onSave={(updated) => { saveBook(book.id, updated); setEditingBookId(null) }}
                                 onClose={() => setEditingBookId(null)}
                               />