Black Library Advent Calendar 2018 is a 12-book series with 12 released primary works first released in 2018 with contributions by Graham McNeill, Rachel Harrison, Guy Haley, C.L. Werner, David Annandale, David Guymer, L.J. Goulding, Nick Kyme, Phil Kelly, Gav Thorpe, Peter McLean, and Aaron Dembski-Bowden.