Legacy of Russ: Infurnace (War Zone: Fenris Book 5)

Despite the best attempts of the Space Wolves to protect their home system from Chaos, the battle enters a new level of ferocity when a Khornate daemon manifests itself on the moon of Svellgard. Can Harald Deathwolf and his company contain the daemonic incursion before the moon is ripped apart? And in space, Ragnar Blackmane and Inquisitor de Mornay fight to regain control of a Ramilies-class starfort, for if they cannot reclaim it from the forces of darkness, it must be destroyed.

Read it because
The stakes continue to be raised, and no one is safe. Can the Space Wolves come back from the brink, or is their future one of damnation? Only one way to find out…