Guy Haley is the author of the Horus Heresy novels Titandeath, Wolfsbane and Pharos, the Primarchs novels Konrad Curze: The Night Haunter, Corax: Lord of Shadows, Perturabo: The Hammer of Olympia, and the Warhammer 40,000 novels Dark Imperium, Dark Imperium: Plague War, The Devastation of Baal, Dante, Baneblade, Shadowsword, Valedor and Death of Integrity.

He has also written Throneworld and The Beheading for The Beast Arises series. His enthusiasm for all things greenskin has also led him to pen the eponymous Warhammer novel Skarsnik, as well as the End Times novel The Rise of the Horned Rat. He has also written stories set in the Age of Sigmar, included in War Storm, Ghal Maraz and Call of Archaon. He lives in Yorkshire with his wife and son.

Danie Ware is the author of the novellas The Bloodied Rose, Wreck and Ruin and the short story 'Mercy', all featuring the Sisters of Battle. She lives in Carshalton, south London, with her son and two cats and has long-held interests in role-playing, re-enactment, vinyl art toys and personal fitness.

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.

Mike Brooks is a speculative fiction author who lives in Nottingham, UK.

His work for Black Library includes the Warhammer 40,000 novel Rites of Passage, the Necromunda novella Wanted: Dead, and the short stories ‘The Path Unclear’, ‘A Common Ground’ and ‘Choke Point’. When not writing, he works for a homelessness charity, plays guitar and sings in a punk band, and DJs wherever anyone will tolerate him.

Steve Lyons’ work in the Warhammer 40,000 universe includes the novellas Engines of War and Angron's Monolith, the Imperial Guard novels Death World, Ice Guard and Dead Men Walking, and the audio dramas Waiting Death and The Madness Within. He has also written numerous short stories and is currently working on more tales from the grim darkness of the far future.

Matt Smith is one of Black Library's newest authors, and the Warhammer 40,000 short story 'In Service Eternal' is his first. He is based in Norwich and spends his spare time working on his Raven Guard army and training in martial arts.

John French is the author of several Horus Heresy stories including the novels The Solar War, Praetorian of Dorn, Tallarn and Slaves to Darkness, the novella The Crimson Fist, and the audio dramas Dark Compliance, Templar and Warmaster. For Warhammer 40,000 he has written Resurrection, Incarnation and Divination for The Horusian Wars and three tie-in audio dramas – the Scribe award-winning Agent of the Throne: Blood and Lies, as well as Agent of the Throne: Truth and Dreams and Agent of the Throne: Ashes and Oaths. John has also written the Ahriman series and many short stories.

Darius Hinks is the author of the Warhammer 40,000 novel Blackstone Fortress and two novels in the Mephiston series, Mephiston: Blood of Sanguinius and Mephiston: Revenant Crusade.

He also wrote the novella Sanctus. For Warhammer, he wrote Warrior Priest, which won the David Gemmell Morning Star Award for best newcomer, as well as the Orion trilogy, Sigvald and several novellas. His work for Age of Sigmar includes Hammers of Sigmar, Warqueen and the forthcoming Gotrek Gurnisson novel Ghoulslayer.

Nate Crowley is an SFF author and games journalist who lives in Walsall with his wife, daughter, and a cat he insists on calling Turkey Boy.

He loves going to the zoo, playing needlessly complicated strategy games, and cooking incredible stews. Severed is his third story for Black Library, the others being ‘Empra’ and 'The Enemy of My Enemy'.

Andy Clark has written the Warhammer 40,000 novels Kingsblade, Knightsblade and Shroud of Night, as well as the novella Crusade and the short story 'Whiteout'. He has also written the novels Gloomspite and Blacktalon: First Mark for Warhammer Age of Sigmar, and the Warhammer Quest Silver Tower novella Labyrinth of the Lost. Andy works as a background writer for Games Workshop, crafting the worlds of Warhammer Age of Sigmar and Warhammer 40,000. He lives in Nottingham, UK.

Alec Worley is a well-known comics and science fiction and fantasy author, with numerous publications to his name. He is an avid fan of Warhammer 40,000 and has written many short stories for Black Library including 'Stormseeker’, 'Whispers' and 'Repentia'. He has recently forayed into Black Library Horror with the audio drama Perdition's Flame and his novella The Nothings, featured in the anthology Maledictions. He lives and works in London.

Marc Collins is a speculative fiction author living and working in Glasgow, Scotland. He is the writer of the Warhammer Crime novel Grim Repast, as well as the short story ‘Cold Cases’, which featured in the anthology No Good Men.

For Warhammer 40,000 he has written a number of short stories, including ‘Duty Unto Death’, ‘The Crueltymaker’s Kingdom’ and ‘The Death of the Prophet’. When not dreaming of the far future he works in Pathology with the NHS.