Amazon.com description: Product Description: The Ecstasy of Enlightenment is an inside look at the spiritual world of Tantraone of the most sophisticated, alluring, and controversial forms of Buddhism. Cleary unlocks the mysteries of the CaryaGiti, a collections of teachings by more than twenty famous Siddhas, or Tantric adepts, who lived during the illustrius Pala dynasty of old Bengal. These teachings emanate from one of the most dynamic sources of international Buddhism, at the height of its religious development, and as such, they are completely nonsectarian. Particularly noteworth is Cleary's demonstration of the parallels between Tantric Buddhism in Old Bengal and the original Zen Buddhism of China.