ISBN-13: 9788028339470 / Angielski / Miękka / 44 str.
The Psychology of Hashish is an autobiographical essay of Aleister Crowley's experimentation with cannabis. Heavy use of hashish during Thelema rituals comprise the important part of Crowley's philosophy. In this essay, Crowley explains the importance of drug use during the rituals, calling it an aid to mysticism.