First published under the pseudonym Oliver Haddo in The Equinox,The Psychology of Hashish is an autobiographical account of Aleister Crowley's experimentation withCannabis sativa. Crowley places his study in the context of reports on hashish by numerous authors, artists, sages and mages throughout history, from the notable to the obscure.

This new annotated edition ofThe Psychology of Hashish from Anubis Books includes footnotes and images.