various
Heralds of the Siege
part 52

Horus has triumphed. His fleet nears Terra and the Throne of his hated father. Many have fallen to bring this moment about, their tales – collected here – are the ashes upon which the Heresy was born and prospered.
The Horus Heresy
anthology

It contains:
The Board Is Set
Dreams of Unity
Exocytosis
Now Peals Midnight
Dark Compliance
The Ember Wolves
Duty Waits
The Painted Count
Children of Sicarus
The Soul, Severed
Valerius
The Grey Raven
The Last Son of Prospero
Magisterium
Blackshield
Myriad