In Nat Freedland’s The Occult Explosion, the author documents Israel Regardie’s connection with Grady Louis McMurtry, as well as how Regardie’s anger over John Symonds’ Crowley biography, The Great Beast, launched him back into the occult.

Cover of The Occult Explosion by Nat Freedland
Copyright page of The Occult Explosion by Nat Freedland, published 1972 by Berkeley Medallion Books