Rob Sanders is the author of The Serpent Beneath a novella that appeared in the New York Times bestselling Horus Heresy anthology The Primarchs. His other Black Library credits include the Warhammer novel Archaon: Everchosen, the Warhammer 40,000 books Redemption Corps, Atlas Infernal, Legion of the Damned and various shorter tales for the Horus Heresy. He lives in the small city of Lincoln, UK.

Born and raised in California, Helen Yoon graduated from the University of California, Irvine with a BS in chemistry and from Art Center College of Design with a BFA in illustration. She writes and draws for a living. She is fond of sabbaticals.