Flames of Betrayal

Book : The Horus Heresy: Siege of Terra

by James Swallow, John French, Nick Kyme, Dan Abnett, Gav Thorpe

Genres: Colonization; Space Marines

Synopsis

The Siege of Terra has reached it's bloody conclusion, if humanity is to survive it must claw its way out of the ashes. The Era of Ruin has come.

In the ashes of Terra, the wounds of the Horus Heresy fester. While the conflict between Horus and the Emperor of Mankind has reached its bloody end, humanity must now navigate the consequences. If anyone is to survive this Era of Ruin, they must claw their way through the remnants of betrayal, carnage and destruction. The scars of the Siege run deep in the wake of battles like that of Nathaniel Garro, forced to face his father, the monstrous traitor primarch Mortarion, during the height of the conflict.

Some of Black Library’s most beloved authors explore the death throes and immediate aftermath of the Siege of Terra, including Dan Abnett, Aaron Dembski-Bowden, Guy Haley and more. This omnibus contains the novella Garro: Knight of Grey by James Swallow and the Era of Ruin anthology.

Release date: July 28, 2026

Publisher: Games Workshop

Print pages: 384