"Legacies of Betrayal" is the thirty-first book in the Horus Heresy Series, an anthology published in October 2014 by a collection of renowned authors. It explores various narratives within this vast science fiction universe.

The 50th Volpone "Bluebloods," a regiment of proud noble soldiers, face their toughest campaign yet liberating the Agria island chain from the Blood Pact. Against impossible odds and a cunning enemy plot, an unlikely hero emerges, but the war's brutal cost threatens to break them.

This unabridged anthology, featuring tales from multiple authors including Dan Abnett and Aaron Dembski-Boden, explores the immediate aftermath of the Horus Heresy and the devastating Siege of Terra. Through varied perspectives, it delves into the struggles of those on both sides as they navigate the trauma and begin to rebuild the Imperium in a new Era of Ruin.