C L Werner's Black Library credits include the Age of Sigmar novels Overlords of the Iron Dragon and The Tainted Heart, the novella Scion of the Storm in Hammers of Sigmar, the Warhammer novels Deathblade, Mathias Thulmann: Witch Hunter, Runefang and Brunner the Bounty Hunter, the Thanquol and Boneripper series and Time of Legends: The Black Plague series. For Warhammer 40,000 he has written the Space Marine Battles novel The Siege of Castellax. Currently living in the American south-west, he continues to write stories of mayhem and madness set in the Warhammer worlds.

Gordon Rennie is a Scottish comics writer, who has written both the comics and videogame and gaming industries since 1991 and his first published work in Blast! Magazine. He went on to creat the cult classic White Trash: Moronic Inferno, for Toxic! as well as several comic strips for 2000 AD and novels for Warhammer Fantasy.

For 2000 AD he created Missionary Man, Witch World and Rain Dogs, Necronauts and Caballistics, Inc. He also wrote Mean Machine and the return of Rogue Trooper. Rennie has done a lot of work on computer games and was nominated for the 2006 BAFTA for his script on the Rogue Trooper game as well as a nomination for the 2012 Writers' Guild of Great Britain's Best Videogame Script award.

Graham McNeill has written many Horus Heresy novels, including The Crimson King, Vengeful Spirit and his New York Times bestsellers A Thousand Sons and the novella The Reflection Crack'd, which featured in The Primarchs anthology. Graham's Ultramarines series, featuring Captain Uriel Ventris, is now six novels long, and has close links to his Iron Warriors stories, the novel Storm of Iron being a perennial favourite with Black Library fans. He has also written the Forges of Mars trilogy, featuring the Adeptus Mechanicus. For Warhammer, he has written the Warhammer Chronicles trilogy The Legend of Sigmar, the second volume of which won the 2010 David Gemmell Legend Award.