After Istvaan V, Horus declares outright war against the Imperium. In the shadows of the Emperor's Palace, powerful figures convene. Their plan - to send a team of assassins to execute the arch-traitor Horus and end the war for the galaxy of mankind before it's even begun. But what they cannot know is that another assassin is abroad already, with his sights firmly set on killing the Emperor.
James Swallow is a British author and scriptwriter. He is the author of several original books and tie-in novels, including The Sundowners series of Western fiction steampunk novels, and fiction from the worlds of Star Trek, Warhammer 40,000, Doctor Who, Stargate and 2000 AD. He lives and works in London.
Warhammer 40,000: The Horus Heresy consists of fifty-four primary works, and includes one additional book that complement the series but is not considered mandatory reads. The current recommended reading order for the series is provided below.