The lords of silence - Chris Wraight

The Cadian Gate is broken, and the Imperium is riven in two. The might of the Traitor Legions, kept shackled for millennia behind walls of iron and sorcery, has been unleashed on a darkening galaxy. Among those seeking vengeance on the Corpse Emperor's faltering realm are the Death Guard, once proud crusaders of the Legiones Astartes, now debased creatures of terror and contagion. Mighty warbands carve bloody paths through the void, answering their lord primarch's call to war. And yet for all their dread might in arms, there is no escape from the vicious legacies of the past, ones that will pursue them from the ruined daemon-worlds of the Eye of Terror and out into the smouldering wastes of the Imperium Nihilus.