The Codex: Genestealer Cults book gives you an in-depth background and lore on the Genestealer Cults, how they take over planets and prepare them for the Great Devourer even going so far as to infiltrate the Imperial military structure.
Containing rousing artwork that will inspire your cults to acts of exemplary sedition and a showcase of expertly-painted Genestealer Cults miniatures.
All the rules you need to play your Genestealer Cults army, including 24 datasheets covering every unit and five Detachments.