Gav Thorpe
Master of the First

On Caliban, those Dark Angels loyal to Luther grow impatient for a return to past glories, allowing the corruption at the world’s heart to spread.
The Horus Heresy
short

Also in:
Dark Angels: the Story So Far
The Horus Heresy Audio Drama Bundle 2015
The Horus Heresy Audio Collection Volume 2
Legions Divided Quick Read Collection
Eye of Terra