Psychedelic Buddhism: A User's Guide to Traditions, Symbols, and Ceremonies By Lama Mike Crowley

Lama Mike Crowley examines the relationship between psychedelics and Buddhist practice, for Buddhists curious about them and for psychonauts interested in Buddhist maps of inner space. He discusses the kinds of spiritual experience reported with different substances.

The book also describes meditation techniques, with particular attention to generating the Four Positive Attitudes. It is a discussion of traditions, symbols and ceremonies; many substances discussed are illegal and carry health risks, and nothing here is medical or legal advice.