In this 96-page hardback book, you'll find:

– Chaos Daemon narrative 
– photography
– Additional rules for using six factions in Boarding Actions – Adeptus Mechanicus, Death Guard, Chaos Daemons, Genestealer Cults, Tyranids, and Necrons
– Terrain component rules for Boarding Actions
– Eight new Boarding Actions missions, plus a system for linking your games together into a Rock Besieged campaign
– Datasheets for Vashtorr the Arkifane and Grand Master Azrael

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