A terrific book! Thurman's lectures on Tantric Buddhism are fascinating, and they are counterpointed well by Wise's narration of the trek to Kalias, his own failings and fears, and his relationship to his teacher. Thurman is (as always) enlightening and impressive, and Wise's story is wonderful in that he is "only" human, too-- it makes the path toward enlightenment seem possible for the rest of us! Also, it's a great book about an exciting trek to the backcountry of Tibet. A wonderful book!!