Book excerpt: In South India there is a society where priests and lay people claim supernatural powers. Where a sophisticated medical system underlies a quest for physical longevity and psychic immortality and where arcane and sexual rituals take place that are far removed from the Brahmanic tradition of the rest of India. That society is the Tamil Siddhas. Here expert Kamil Zvelebil offers a vivid picture of these people: religious beliefs, magical rites, alchemical practices, complex system of medicine, and inspired tradition of poetry. Topics covered include: On Siddhas medicine; The ideological basis of Siddhas quest of immortality; Basic tenets of Siddhas medicine; Diseases and their cure; Yoga in Siddhas tradition; Daily regime; Siddhas alchemy; Rejuvenation, longevity, and 'immortality'; Doctrines and traditions of the Siddhas; Tantrik Siddhas and Siddhas attitudes to sex; Siddhas poetry and other texts.