The Horus Heresy is a series of novels, anthologies and audiobooks based on the historic events known as the Great Crusade and the Horus Heresy. The novels are written by different authors, but follow the same storyline - the fall of Warmaster Horus and his campaign of treachery to usurp the Emperor as ruler of the Imperium.
The publishing order of the books does not reflect an attempt to tell the overall storyline chronologically; the stories are set are various points within the overall meta-plot, gradually illuminating the whole tale from various perspectives. There are directly connected works within this structure, however; the first three novels are a distinct trilogy, the eleventh is a sequel (of sorts) to the sixth, and the 12th and 15th are intended by the authors to be a duology.

Horus Heresy - Warhammer 40,000 EBooks

The Story
Having recovered from his grievous injuries, Warmaster Horus leads the triumphant Imperial forces against the rebel world of Isstvan III. Though the rebels are swiftly crushed, Horus's treachery is finally revealed when the planet is razed by virus bombs and Space Marines turn on their battle-brothers in the most bitter struggle imaginable.
Listen to it because...
This is the third novel in the epic opening trilogy of the Horus Heresy. In Galaxy in Flames, the Warmaster’s treachery is revealed as he seeks to purge those warriors still loyal to the Emperor from the ranks of his Legion.
The battle for the soul of mankind has truly begun.
About this audiobook
This complete and unabridged audiobook has an approximate running time of 8 hours 51 minutes
Narrated by Toby Longworth
Produced by Black Library
Music by Jai Channa.