A Chaos Space Marines anthology

The tale of Ctesias, a servant of Ahriman who has performed terrible deeds in his master’s name. From daemon summoning to base betrayal, here is the chronicle of those deeds.

READ IT BECAUSE
Ctesias, a name you're sure to recognise from the Ahriman trilogy, takes centre stage and is the hero of his own story in this collection of tales... and that might just make Ahriman the villain. See the arch-sorcerer's manipulations through new eyes and experience some of the horrors he inflicts on his followers. The book also contains the first Black Library appearance of a classic character: Be'lakor, the first daemon prince of Chaos.