various
The Novels: Volume Five

The Blood Angels discover the truth behind Chaos, Perturabo and Fulgrim venture into the heart of darkness and the Shadow Crusade rampages across Ultramar in this fifth collection of Horus Heresy novels
The Horus Heresy
collection

It contains:
Mark of Calth
Betrayer
Angel Exterminatus
Fear To Tread
Shadows of Treachery