Dayton Erdmann

Under almost constant besiegement by the hosts pouring from the Eye of Terror, Cadia acts as a bulwark against tyranny and death. Its fortresses and armies have held back the hordes of Chaos for centuries, but that grim defiance is about to reach its end. As Abaddon's Thirteenth Black Crusade batters Cadia's defences, and armies of the Imperium flock to reinforce this crucial world, a terrible ritual long in the making comes to fruition and the delicate balance of this brutal war shifts.

Nathaniel Garro - loyalist Death Guard, and hero of the Eisenstein - has found a new calling in his service to the Emperor. Surrounded by a cloak of secrecy, Garro travels the galaxy in pursuit of his new goal. His quest will lead him to heart of the most destructive warzones and reveal a secret that will change the course of the Horus Heresy itself....

When the Imperial prison barge Purge—temporary home to five hundred of the galaxy’s most ruthless killers, Rebels, scoundrels, and thieves—breaks down in a distant part of space, its only hope appears to lie with a Star Destroyer found drifting and seemingly abandoned. But when a boarding party from the Purge is sent to scavenge for parts, only half of them come back—bringing with them a horrific disease so lethal that within hours, nearly all aboard the Purge die in ways too hideous to imagine.