The Damnation of Pythos
In the aftermath of the Dropsite Massacre at Isstvan V, a battered and bloodied force of Iron Hands, Raven Guard and Salamanders regroups on a seemingly insignificant death world. Fending off attacks from all manner of monstrous creatures, the fractious allies find hope in the form of human refugees fleeing from the growing war, and cast adrift upon the tides of the warp. But even as the Space Marines carve out a sanctuary for them in the jungles of Pythos, a darkness gathers that threatens to consume them all...
Warhammer 40,000: The Horus Heresy
Warhammer 40,000: The Horus Heresy consists of fifty-four primary books, and includes one additional book that complement the series but is not considered mandatory reads. The current recommended reading order for the series is provided below.
Main series Warhammer 40,000
Related series The Horus Heresy: Primarchs
Related series The Horus Heresy: The Siege of Terra