For your own reseach here are a few links. More will be added as time permits.
Chasing the Scream: The Opposite of Addiction is Connection
How to Change Your Mind: What the New Science of Psychedelics Teaches Us About Consciousness, Dying, Addiction, Depression, and Transcendence
Kava: The drink of the Gods
DMT: The spirit molecule
The Nature of Ayahuasca
Multidisciplinary Association for Psychedelic Studies
Ok I want to join in a ceremony!!