Inside this 208-page hardback book, you'll find:

- The Crucible of a Dark Age
- Campaigns of The Age of Darkness: The Garmon Bulwark
- Age of Darkness: Core Missions
- The Garmon Bulwark: Apex Missions
- Legiones Astartes: Shattered Legions
- Legiones Astartes: Blackshields
- Legiones Auxilia and Solar Auxilia
- Legiones Astartes: New Units
- Showcase

In order to use the contents of this book, you will require the Warhammer: The Horus Heresy – The Age of Darkness Rulebook and one of the Army Books for Warhammer: The Horus Heresy, which are all available separately.