A combined index titled The History of Middle-earth: Index was compiled by Helen Armstrong from the twelve indices of The History of Middle-earth. It was published in 2002 by HarperCollins in paperback, six years after the series by Christopher Tolkien was completed, and then again in 2010.
The book creates a supreme index charting the writing of The Lord of the Rings and The Silmarillion. It also complements the History of Middle-earth series, repackaged to complement the distinctive and classic style of the '"black cover" A-format paperbacks of The Hobbit, The Lord of the Rings, The Silmarillion, and Unfinished Tales.
It is 484 pages long, and is designated as the thirteenth (and last) volume of The History of Middle-earth.
Translations[]
| Foreign Language | Translated name |
| Afrikaans | Die Geskiedenis van Middelste-aarde: Indeks |
| Albanian | Historia e Tokës së Mesme: Indeksi |
| Amharic | መካከለኛ-የምድር ታሪክ: መረጃ ጠቋሚ |
| Arabic | تاريخ الأرض الوسطى: فِهرِس |
| Armenian | Միջերկիր պատմություն: ինդեքս |
| Azerbaijani | Orta Yerin Tarixi: Indeks |
| Belarusian Cyrillic | Гісторыя Міжзем'е: Індэкс |
| Bengali | মধ্যম পৃথিবীর ইতিহাস: সূচক |
| Bosnian | Povijest Međuzemlja: Indeks |
| Bulgarian Cyrillic | Историята на средната земя: Индекс |
| Burmese | အလယ်အလတ်မြေ၏သမိုင်း: အညွှန်း |
| Cambodian | ប្រវត្តិសាស្រ្តនៃផែនដីពាក់កណ្តាល: សន្ទស្សន៍ |
| Catalan | Índex de La història de la Terra Mitja |
| Cebuano | Ang Kasaysayan sa mga tunga-tunga-yuta: Index |
| Chinese | 中土世界的歷史：索引 |
| Croatian | Povijest Međuzemlja: Indeks |
| Czech | Historie Středozemě: Rejstřík |
| Danish | Historien om Midgård: Indeks |
| Dutch | De Geschiedenis van Midden-aarde: Inhoudsopgave |
| Estonian | Keskmaa Ajalugu: Indeks |
| Finnish | Keski-Maan historia: indeksi |
| French | Indice de l'histoire de la Terre du Milieu |
| Friulian | Indice de Storie de Tiere di Mieç |
| Galician | Índice da Historia da Terra Media |
| Georgian | შუახმელეთის ისტორია: სარჩევი |
| German | Der Index zur Geschichte von Mittelerde |
| Greek | Η Ιστορία της Μέσης Γης: Δείκτης |
| Gujarati | મધ્યમ પૃથ્વી ઇતિહાસ: અનુક્રમણિકા |
| Hebrew | תולדות הארץ התיכונה: אינדקס |
| Hindi | मध्य पृथ्वी के इतिहास: अनुक्रमणिका |
| Hmong | Lub keeb kwm ntawm nruab nrab-lub ntiaj teb: Index |
| Hungarian | Középfölde Históriája: Tárgymutató |
| Icelandic | Saga af Miðgarði: Vísitala |
| Italian | Indice della Storia della Terra di Mezzo |
| Japanese | 中つ国の歴史: 索引 |
| Javanese | Sajarah Tengah-bumi: Indeks |
| Kannada | ಇತಿಹಾಸ ಮಧ್ಯಮ ಭೂಮಿಯ: ಸೂಚ್ಯಂಕ |
| Kazakh | Орта-жер тарихы: Индекс (Cyrillic) Orta-jer tarïxı: Ïndeks (Latin) |
| Korean | 가운데땅의 역사: 색인 |
| Kyrgyz Cyrillic | Орто жер Тарыхы: Индекс |
| Laotian | ປະຫວັດສາດຂອງພາກກາງ, ແຜ່ນດິນໂລກ: ດັດຊະນີ |
| Latvian | Vēsture Vidējā-zemes: Rādītājs |
| Lithuanian | Vidurio žemės istorijos rodyklė |
| Macedonian Cyrillic | историјата на Блискиот Земјата: Индекс |
| Malaysian | Sejarah pertengahan bumi: Indeks |
| Maltese | L-istorja ta ' l-ert tan-nofs: Indiċi |
| Marathi | मध्य-पृथ्वी इतिहास: निर्देशांक |
| Nepalese | मध्य-पृथ्वीको इतिहास: अनुक्रमणिका |
| Norwegian | Historien om Midgard: Indeks |
| Occitan | Indici de l'istòria de la Tèrra Mejana |
| Pashto | د منځني ځمکه د تاريخ: شاخص |
| Persian | تاریخ از میانه زمین : فهرست مطالب |
| Polish | Historia Śródziemia: Indeks |
| Portuguese | Índice da História da Terra Média |
| Punjabi | ਮੱਧ-ਧਰਤੀ ਦੇ ਇਤਿਹਾਸ ਨੂੰ: ਸੂਚਕਾਂਕ |
| Romanian | Indexul Istoriei Pământului de Mijloc |
| Russian | История Средиземья: Указатель |
| Sardinian | Inditze de s'Istòria de sa Terra Mesana |
| Scottish Gaelic | Eachdraidh de Meadhan-talamh: Clàr-innse |
| Serbian | Повијест Међуземља: Индекс (Cyrillic) Povijest Međuzemlja: Indeks (Latin) |
| Sindhi | وچ ۾ زمين جي تاريخ: انڊيڪس |
| Sinhalese | මැද-පෘථිවිය ඉතිහාසය: දර්ශකය |
| Spanish | El índice de la historia de la Tierra Media |
| Sundanese | Nu Sajarah Tengah-bumi: Indéks |
| Swahili | Historia ya Dunia-atikati: Kielezo |
| Swedish | Historia Midgård: Index |
| Tajik Cyrillic | Таърихи Миёна-замин: Индекс |
| Tamil | மத்திய-புவி வரலாறு: குறியீட்டு |
| Tatar | Урта җир тарихы: Индекс |
| Telugu | మధ్య భూమి యొక్క చరిత్ర: సూచిక |
| Thai | ดรรชนีประวัติศาสตร์มิดเดิลเอิร์ธ |
| Turkish | Orta Dünya Tarihi : Dizin |
| Turkmen | Orta Ýer Taryhy: Indeks |
| Ukrainian Cyrillic | Історія Середзем'я: Індекс |
| Urdu | مڈل-زمین کی تاریخ: انڈیکس |
| Uzbek | Ўрта жаҳон тарихи: Индекс (Cyrillic) O'rta jahon tarixi: Indeks (Latin) |
| Venetian | Indice de ła Storia de ła Tera de Mezo |
| Welsh | Hanes Daear Ganol: Mynegai |
| Xhosa | Yeembali KuMbindi-emhlabeni: Isalathiso |
| Yiddish | די געשיכטע פון מיטל-ערד: אינדעקס |
| Yoruba | Awọn itan ti Arin-ayé: Atọka |