Warhammer 40k the Soul Drinkers Second Omnibus

"The renegade Soul Drinkers continue their misguided campaign to free mankind from the tyranny of the Imperium in this second trilogy of novels by Ben Counter. In Chapter War, the Soul Drinkers, harried by loyalist Space Marines, fall into the grip of a devastating civil war. Hellforged sees the Chapter fleeing into the mysterious Veiled Regions where they encounter a new threat - the necrons. As they battle the undying aliens, the Soul Drinkers' past catches up with them as the Imperial Fists - their spiritual progenitors - arrive. Captured and put on trial, Sarpedon must find a way to save his warriors even as the Imperial Fists' mighty starfort Phalanx comes under attack from a horde of ravening daemons."