David Annandale is the author of the Horus Heresy novels Ruinstorm and The Damnation of Pythos, and the Primarchs novel Roboute Guilliman: Lord of Ultramar. He has also written Warlord: Fury of the God-Machine, the Yarrick series, several stories involving the Grey Knights, including Warden of the Blade and Castellan, as well as The Last Wall, The Hunt for Vulkan and Watchers in Death for The Beast Arises. For Space Marine Battles he has written The Death of Antagonis and Overfiend. He is a prolific writer of short fiction set in The Horus Heresy, Warhammer 40,000 and Age of Sigmar universes. David lectures at a Canadian university, on subjects ranging from English literature to horror films and video games.