Betrayal at Calth (Anthology)
|This article is about the anthology. For other uses of Betrayal at Calth, see Betrayal at Calth (disambiguation).
Betrayal at Calth is an anthology in the Horus Heresy series, collecting the novellas The Honoured by Rob Sanders and The Unburdened by David Annandale, depicting a phase of the Underworld War on Calth from the perspectives of the Ultramarines and the Word Bearers, respectively.
The Word Bearers' attack on Calth has devastated the planet and driven the survivors, Ultramarines and Word Bearers alike, into the caverns beneath the planet's surface. The Underworld War has begun. Old comrades Kurtha Sedd of the Word Bearers and Steloc Aethon of the Ultramarines clash in a series of battles that can only end in the death of one of them... or both.