Outside the loyalist Space Marine Legions and the Cult Mechanicum, the Emperor wields forces which are loyal only to him. The Legio Custodes guard the Emperor's person, while the Sisters of Silence stand watch over the Black Ships. The Solar Auxilia are the elite spearhead of the Imperial Army, exemplars of mortal soldiery, while the Divisio Assassinorum is the Emperor's culling blade, aimed at the neck of any foolish enough to imperil his grand dream of Unity.

This book is an essential guide for anyone who wants to represent the varied Imperial forces that fight against and alongside the transhuman Space Marine Legions in games of Warhammer: The Horus Heresy. It contains all the rules you need to field the strictly-Loyalist Agents of the Emperor, from shining Custodes to shadowy Assassins, as well as the numberless ranks of the Solar Auxilia – who can keep faith with the Emperor or rally to the Warmaster.

Inside this 176-page hardback book, you'll find:

• Rules and unit profiles covering every unit, weapon, and piece of wargear available to the Legio Custodes, Sisters of Silence, Divisio Assassinorum, and Solar Auxilia in Warhammer: The Horus Heresy
• Warlord Traits for Legio Custodes, Sisters of Silence, a unique Reaction for agents of the Divisio Assassinorum, and rules for the Tercio and Cohort Doctrines of the Solar Auxilia, to let you bring the forces of the Emperor to the tabletop
• Profiles for seven different Divisio Assassinorum Clade Operatives and Constantin Valdor, the Shield of the Emperor
• A visual showcase for a variety of Imperial armies, containing heraldry markings, iconography, colour schemes for infantry and vehicles, and a small gallery of stunning photography

In order to use the contents of this book, you will require a copy of the Warhammer: The Horus Heresy – Age of Darkness Rulebook.