David Annandale is the author of the Horus Heresy novel The Damnation of Pythos, along with the Grey Knights books Sons of Titan and Warden of the Blade. He also writes the Yarrick series, consisting of the novella Chains of Golgotha and the novels Imperial Creed and The Pyres of Armageddon. For the Space Marine Battles series, he has written the novels The Death of Antagonis and Overfiend, while he is also the author of three volumes in The Beast Arises series: The Last Wall, The Hunt for Vulkan and Watchers in Death. David lectures at a Canadian university on subjects ranging from English literature to horror films and video games. Robbie MacNiven is a highland-born History graduate from the University of Edinburgh whose hobbies include re-enacting, football and obsessing over Warhammer 40,000. For Black Library, he has written the Deathwatch short story 'Redblade' from Deathwatch: Ignition and the Warhammer 40,000 novels Legacy of Russ and Carcharadons: Red Tithe, along with the short tales 'A Song for the Lost' and 'Blood and Iron'.