Graham McNeill
Leviathan

Uriel Ventris returns to action after his adventures on Pavonis. He and his company have been charged to destroy a Space Hulk that may carry an Ork warband.
Warhammer 40k
short

Also in:
The Uriel Ventris Chronicles: Volume 1
Crucible of War
Honour And Vengeance: Uriel Ventris Vs Honsou
Ultramarines Xmas Ebundle
Ultramarines: Quick Reads Collection