David Annandale is the author of the Horus Heresy novels Ruinstorm and The Damnation of Pythos, and the Primarchs novels Roboute Guilliman: Lord of Ultramar and Vulkan: Lord of Drakes. For Warhammer 40,000 he has 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 titles for The Beast Arises and the Space Marine Battles series. For Warhammer Age of Sigmar he has written Neferata: Mortarch of Blood. David lectures at a Canadian university, on subjects ranging from English literature to horror films and video games.