David Annandale’s Warden of the Blade is the first novel in a new trilogy from Black Library featuring Castellan Crowe of the Grey Knights, beginning the series by showing how Garran Crowe came to wield the Black Blade of Antwyr. The Grey Knights are sent to Sandava II to prevent or halt a daemonic incursion, Crowe and his fellow Purifiers following the then-Castellan Gavallan in the righteous prosecution of a daemonic plague afflicting the once-loyal world. Forced to battle both the daemons and the insidious power of the blade, Crowe and Gavallan lead their brothers into a battle only the strongest and purest could hope to survive.