For those typing the keyword into search engines, you are likely looking for one specific, elusive tome: Horus Heresy: Book Two – Massacre . Published by Forge World (a division of Games Workshop) rather than the standard Black Library paperback line, this book is not a novel but a campaign supplement for the Legiones Astartes tabletop wargame.
Massacre introduces extensive background, color profiles, and rules for four major Space Marine Legions that played critical roles in the betrayal: horus heresy book 2 massacre pdf
For gamers, this is the goldmine. Massacre introduced the rules for the , which allows players to field Legions before they fully turned to Chaos. Specifically, it covers: For those typing the keyword into search engines,