Inside this 112-page book, you'll find:

- The clandestine legacy of the Grey Knights, including their myth-shrouded founding and classified operations throughout the history of the Imperium
- A guide to the unorthodox organisation and heraldry of the Grey Knights and their various Brotherhoods
- A Grey Knights bestiary with background details for every unit and Character featured
- A showcase of stunningly painted Citadel miniatures
- Rules for units that are available to the armies of the Grey Knights – including 32 datasheets
- Stratagems, Relics, and optional secondary objectives that illustrate the mystifying goals and remarkable tactics of the Grey Knights
- A Crusade section providing Agendas, Crusade Relics, Battle Traits, Requisitions, Psychic Fortitudes, Honoured Titles, and unique Daemonic Nemesis rules
- Loads more