Index: Xenos 2 Warhammer 40,000 Book by Games Workshop. Xenos 2 Index Warhammer 40K Miniature Game Games Workshop. 144-page softback book. 137 datasheets covering the Ork, T'au Empire, Tyranid and Genestealer Cults range of miniatures. Additional miniatures and rule books are required to play Warhammer 40K. For ages 14 and up.