Aaron Dembski-Bowden is the author of the Horus Heresy novels Betrayer and The First Heretic, as well as the novella Aurelian and the audio drama Butcher’s Nails, for the same series. He also wrote the popular Night Lords series, the Space Marine Battles book Helsreach, the Abaddon novel The Talon of Horus, the Grey Knights novel The Emperor’s Gift and numerous short stories. He lives and works in Northern Ireland.