The Horus Heresy - Black Library recommended reading order is a 53-book series with 42 released primary works first released in 9 with contributions by Dan Abnett, Graham McNeill, Ben Counter, James Swallow, Mitchel Scanlon, Mike Lee, Aaron Dembski-Bowden, Gav Thorpe, Rob Sanders, David Annandale, John French, Nick Kyme, Chris Wraight, Guy Haley, Anthony Reynolds, and L.J. Goulding.