Book nine in the New York Times bestselling series As the flames of treachery spread outwards through the Imperium, Horus mobilises those forces who are loyal to him, and plots to subvert or destroy those who stand against him. A battle is being fought for the heart and soul of all the Imperial forces - the Astartes, the Imperial Army, the Titan Legions and more. In this epic story, author Graham McNeill tells the story of the civil war on Mars, and the genesis of the Dark Mechanicum.

Author Biography

Graham McNeill is the author of seven Horus Heresy novels, most recently Vengeful Spirit and Angel Exterminatus, along with the New York Times bestseller A Thousand Sons. He has written a host of other novels for Black Library, including Warhammer 40,000 series based on the Ultramarines, the Iron Warriors and the Adeptus Mechanicus. His work in the Warhammer World includes The Legend of Sigmar for the Time of Legends, the second book of which, Empire, won the David Gemmell Legend Award. Originally hailing from Scotland, Graham now lives and works in Nottingham.