Experiential journalist Rak Razam sets out to document the thriving business of 21st-century hallucinogenic shamanism starting with a trip to the annual Amazonian Shaman Conference in Iquitos, Peru, where he meets a motley crew of spiritual tourists, rogue scientists, black magicians, and indigenous and Western healers and guides, all in town to partake of the ritual--and the medicine--of ayahuasca, the vine of souls. Combining his personal story...