 Bertiaux's life and occult system are examined in Kenneth Grant's books, "Cults of the Shadow" (1975), "Nightside of Eden" (1977), "Outside the Circles of Time" (1980), and "Hecate's Fountain" (1993).Grant devotes two entire chapters of "Cults of the Shadow" to a discussion and analysis of Bertiaux's work in La Couleuvre Noire, as well as a portion of the chapter "Afro-Tantric Tarot of the Kalas.