A comprehensive study of the history and philosophy behind Tibetan Buddhism, suitable for the general reader. Powers (a professor of religion at Wright State University and a Tibetan Buddhist himself) clarifies the festivals, doctrines, schools and symbolism associated with the devotion, all within its historical and cultural context. Divided into four sections, it covers: the Indian origins of the religion; Tibetan religious history and culture; doctrines and practices; and the four schools of Tibetan Buddhism.  (TBT40, $22.95)