Inside this 104-page hardback book, you'll find:
– Forbidden lore and background material detailing the long history and unusual organisation of this most secretive Chapter
– Disquieting artwork and dynamic photography that will inspire your collection and stir your creativity
– Rules for using the Grey Knights in games of Warhammer 40,000, with 25 datasheets, five Detachments, and the Gate of Infinity army-wide rule
– A set of rules to launch your own narrative Crusade, tracking down impending daemonic incursions and banishing them
– A guide to painting your Combat Patrol and rules for fielding Crowe's Sanctifiers in skirmish-sized games

This book also contains a one-use code to unlock Codex: Grey Knights content in Warhammer 40,000: The App.