Black Library Advent Calendar 2017
Shown by first publication year; this may not be reading order.
Perturabo: Stone and Iron
Endurance
Duty Waits
Ahriman: Key of Infinity
Magisterium
The Assassination of Gabriel Seth
Now Peals Midnight
Heart of Decay
Dreams of Unity
Malcador: First Lord of the Imperium
The Battle for Hive Markgraaf
The Rage of Asmodai
Konrad Curze: A Lesson in Darkness
Fireheart
The Board is Set