The second novel in the burgeoning Space Marine Conquests series, Gav Thorpe’s Ashes of Prospero sees the Space Wolves stretched thin in the wake of the Cicatrix Maledictum and Magnus’ assault on Fenris. When a weary Njal Stormcaller finds the spirit of a dead Thousand Sons sorcerer lodged within his mind, the revenant reveals that Bulveye and remnants of the 13th Grand Company still fight on, trapped within the Portal Maze. Though loathe to trust the ghostly presence, the prospect of retrieving Bulveye is enough for Njal to risk venturing to Prospero with what few battle brothers he can find.