Fortune corresponded with a number of prominent occultists in this period. One of these was Israel Regardie, whose book The Tree of Life was regarded by Fortune as "quite the best book on magic" that she had read. Regardie later publicly criticised her for misrepresenting his works in her reviews of them; she had claimed that his works bolstered her beliefs about the Masters, although Regardie insisted that he was sceptical about the existence of such entities.