Kay

When Horus the Warmaster rebelled against the Emperor, the ensuing civil war nearly destroyed the Imperium. War raged across galaxy, pitting Astartes against their battle-brothers in a struggle where death was the only victor. But long before that, the Legions struggled with their identities and the demands of the Great Crusade. From battles with alien invaders to conflicts within a Legion, and even dealing with a wayward primarch, these stories show the battles fought as the Great Crusade draws to a close and the Horus Heresy begins....

As the flames of treachery spread throughout the Imperium, Horus plots to subvert or destroy all those who would stand against him. On Mars, home world of the Mechanicum priesthood, the great manufactory-cities have long produced much of the weaponry required for the expeditionary fleets across the galaxy - making the world invaluable to whoever controls it in the coming war.

A Great War is coming, and it will engulf the Imperium of Man. The Space Marines of the Alpha Legion, the last and most secretive of all the Astartes brotherhoods, arrive on a heathen world to support the Imperial Army in a pacification campaign against strange and uncanny forces. But what drives the Alpha Legion?

Ezekyle Abaddon and his warlords strive to bind the newborn Black Legion together under threat of destruction. Now Khayon, as Abaddon's most-trusted assassin, is tasked with ending the threat of Thagus Daravek, the self-proclaimed Lord of Hosts - a rival to the Ezekyle's final fate. Fighting the vile whispers of the Dark Gods within his mind, Abaddon turns a fevered gaze back to the Imperium, where his destiny awaits. Yet the Emperor's Champion and his Black Templars stand guard at the gates of Hell, and Sigismund has waited centuries to face Abaddon in battle.

When Horus fell, his Sons fell with him. A broken Legion, beset by rivalries and hunted by their erstwhile allies, the former Luna Wolves have scattered across the tortured realm of the Eye of Terror. And of Abaddon, greatest of the Warmaster's followers, nothing has been heard for many years. Until now....