Gav Thorpe
Corax
part 40

The Lord of Ravens, Master of Deliverance, Primarch Corvus Corax of the Raven Guard takes centre stage in a collection of works by Gav Thorpe that explore his campaign of vengeance against Horus' allies and his desperate attempts to hold his Legion together.
The Horus Heresy
anthology

It contains:
Weregeld
The Shadowmasters
Raptor
Corax: Soulforge
Ravenlord
The Value of Fear

Also in:
Books 38-40: Unabridged Audiobook Collection