Order of Nine Angles - A Guide to Dark Sorcery (O9A Website Archive 2012)
Order of Nine Angles - Acausality, The Dark Gods, and The Order of Nine Angles
Order of Nine Angles - Tales of the Dark Gods
Aleister Crowley - Liber 500 Sepher Sephiroth Revised
Thomas Potts - Discovery of Witches
Israel Regardie - Das Magische System des Golden Dawn, Band 1 (in German)