Book two in the Ahriman series.

Ahriman, greatest sorcerer of the Thousand Sons and architect of the Rubric that laid his Legion low, continues to walk the path towards salvation, or damnation. Searching for a cure for his Legion, he is forced to consider - was the great ritual somehow flawed from the very beginning?

Listen to it because:

This is the second part in the tale of one of Warhammer 40,000's most notorious villains. The Ahriman series explores the motivations of this dark sorcerer in greater depth than ever before. Horus Heresy fans will also find plenty to enjoy as the story harks back to events of this great civil war, particularly the fate of the lost Book of Magnus.

The story:

Ahriman, greatest sorcerer of the Thousand Sons and architect of the Rubric that laid his Legion low, continues to walk the path towards salvation, or damnation. Searching for a cure for his Legion, he is forced to consider - was the great ritual somehow flawed from the very beginning? The answer may lie within the mysterious artefact known as the Athenaeum of Kalimakus, a grimoire of forgotten knowledge that is reputed to contain the exact words of the lost Book of Magnus...or, perhaps, even a transcription of the primarch’s deepest and most secret thoughts.

Written by John French. Audiobook narrated by Mark Elstob.