This 348-page hardback book contains:
– Background and lore: Information on the Legiones Astartes, their organisation, and examples of their forces.
– Rules and unit profiles: A guide to army building, plus rules for units, weapons, and Wargear available to the Traitor Legiones Astartes in Warhammer: The Horus Heresy.
– Legion-specific special rules: Unit profiles, Detachments, Gambits, Wargear, Faction Abilities and Reactions for each of the Traitor Legions: the Emperor's Children, Iron Warriors, Night Lords, World Eaters, Death Guard, Thousand Sons, Sons of Horus, Word Bearers, and Alpha Legion.
– Primarch profiles: Rules to unleash Fulgrim, Perturabo, Konrad Curze, Angron, Mortarion, Magnus the Red, Horus Lupercal, Lorgar, and Alpharius on the battlefield.
– Visual showcases: Heraldry markings, colour schemes for infantry and vehicles, and a gallery of stunning miniatures photography for each Traitor Legion.
– Loyalists in the midst: Rules for Saul Tarvitz and Garviel Loken so that you can use forces still loyal to the Emperor.

You will need a copy of Warhammer: The Horus Heresy – Age of Darkness Rulebook, available separately, to use the contents of this book.