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Mechanicum (Novel)

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Targetdrone.gif This article is about the novel. For other uses of Mechanicum, see Mechanicum (disambiguation).

Cover Illustration by Neil Roberts
Author Graham McNeill
Performer Toby Longworth
Publisher Black Library
Series Horus Heresy Series
Preceded by Battle for the Abyss
Followed by Tales of Heresy
Released December 2008
Pages 416
Editions 2008 softcover:
ISBN 9781844166640

2010 ebook:
ISBN 9780857870377

Mechanicum by Graham McNeill, published in December 2008, is the ninth book in the Horus Heresy Series. It was later included in "The Novels: Volume 2" eBook collection. The novel concentrates on the civil war within the Adeptus Mechanicus on Mars during the Horus Heresy, leading up to the beginnings of the Dark Mechanicum.

Cover Description

As the flames of treachery spread throughout the Imperium, Horus plots to subvert or destroy all those who would stand against him. On Mars, home world of the Mechanicum priesthood, the great manufactory-cities have long produced much of the weaponry required for the expeditionary fleets across the galaxy — making the world invaluable to whoever controls it in the coming war. Now, the Warmaster's agents begin to stoke the fires of rebellion, turning the loyalist forges and the mighty Titan Legions against one another. And, with whispers spreading of an ancient terror lurking beneath the Red Planet's surface, the Dark Mechanicum rises...

Notable Characters

Martian Mechanicum

Imperial Fists

Collegia Titanica

Knight Houses


Cover art


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