The Horus Heresy · Book 9
Mechanicum
- Published
- 25 November 2008
- Pages
- 416
- ISBN-13
- 9781844166060
- Type
- novel

About this book
"Mechanicum" (2008) is a Horus Heresy novel at number 9 in the Horus Heresy, written by Graham McNeill, and spans 416 pages. It's one of the titles readers are pointed to on the curated spine through the series' wide middle stretch. Like the rest of the Horus Heresy, it's part of Black Library's prequel saga to Warhammer 40,000, telling the ten-thousand-year-old origin story of the Emperor's Great Crusade and the Warmaster Horus's turn to Chaos.
Its place in The Horus Heresy
Mechanicum is book 9 in the The Horus Heresy series. It follows Battle for the Abyss. It is followed by Tales of Heresy. See the full The Horus Heresy reading order.
The Horus Heresy is Black Library's monumental prequel saga to Warhammer 40,000 — the ten-thousand-year-old origin story every 40K fan knows in outline, finally told in full across 54 official volumes by a rotating team of authors. In the 31st millennium the Emperor of Mankind has nearly completed the Great Crusade, reuniting the human galaxy through his twenty superhuman primarch sons and their Space Marine legions. He names his most brilliant son, Horus, Warmaster — then returns to Terra on a secret project…
Editions
- edition · unknown publisher · — · ISBN 9781844166060