In this 104-page hardback book, you'll find:

– The ongoing narrative of Warhammer 40,000, with galaxy-shaking implications for the T’au
– An inspiring showcase of photography and battle scenes, featuring the armies fighting on Arthas Moloch
– Additional rules for using five factions in Boarding Actions – T’au Empire, Asuryani and Ynnari, Drukhari, Harlequins, and Adepta Sororitas
– Rules for playing Dark Depths games set in the unmapped underbelly of a space hulk, allowing you to mix-and-match eight board layouts
– Rules for playing Multiplayer Missions for three-to-four players, including 12 new missions

You will need a copy of the Warhammer 40,000 Core Rules and Arks of Omen: Abaddon to use the contents of this book.