Book XI of The Horus Heresy. As news of Horus’s treachery spreads, the Great Crusade grinds to a halt as the primarchs and their Legions decide where their loyalty lies – with the Emperor or the rebel Warmaster Horus. In this sequel to The Descent of Angels, the Dark Angels too face a time of testing, both in the stars and on their homeworld, Caliban. Civil war erupts as their planet strives to break from Imperial Rule and the Dark Angels are thrust into a deadly conflict where all that they know and trust is thrown into doubt. Cover art by Neil Roberts.