Book: Liber 090 Tzaddi Vel Hamus Hermeticus by Aleister Crowley
"An Account of Initiation, and an indication as to those who are suitable for the same.". See also: Equinox I vi, p. 17; III ixBooks in PDF format to read:
Aleister Crowley - Liber 006 O Vel Manus Et SagittaeAleister Crowley - Liber 016 Turris Vel Domus Dei
Aleister Crowley - Liber 090 Tzaddi Vel Hamus Hermeticus