The Two Antichrists is a monograph by Peter Grey on the figure of Antichrist in a post-Christian and progressive Thelemic context. Opening with considerations on the future of witchcraft and its relation to radical ecology, Grey returns to the Babalon Working of Jack Parsons and L. Ron Hubbard, and considers a series of little examined texts from science fiction and the outer fringes of Scientology which form a 'Babalon Apocrypha.' By reading across these sources, the familiar story is revealed to have hidden depths and dimensions. Exploring the role of Antichrist in relation to Parsons and Hubbard, Grey provides insights into the initiatory drama of Thelema: of Satanic rites, Abyss and Angel. The Two Antichrists observes the long shadow cast by the monolith of Scientology, and Parsons' eclipsed sodality The Witchcraft. Looking to the future, he envisions an emergent space witchcraft, infused with the spirit of Do What Thou Wilt. The book concludes with a series of non-denominational rituals and revised Antichrist workings. The work is a fusion of inspiration, research and ritual, from which Grey draws the first lines of his vision of witchcraft in the dusk of our world.