Warhammer 40,000: Imperial Guard is a 22-book series with 22 released primary works first released in 2005 with contributions by Mitchel Scanlon, Steve Lyons, Steve Parker, Lucien Soulban, Steve Parker, Aaron Dembski-Bowden, Rob Sanders, Richard Williams, Lucien; Parker Soulban, Toby Frost, Andy Hoare, Guy Haley, and Mark Clapham.