This 128-page hardback book contains:
Background and lore:Information on the Solar Auxilia, their organisation, and examples of their forces.
Rules and unit profiles:A guide to army building, Doctrines, and Detachments, plus rules for units, weapons, and Wargear available to the Solar Auxilia in Warhammer: The Horus Heresy.
Legiones Auxilia:Rules for using Solar Auxilia cohorts that are bonded to each of the 18 Legiones Astartes.
Visual showcases:Heraldry markings, colour schemes for infantry and vehicles, and a gallery of stunning miniatures photography.

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