Twenty-five years ago, a young musician and painter named Martin Prechtel wandered through the brilliant landscapes of Mexico and Guatemala. Arriving at Santiago Atitlan, a Tzutujil Mayan village on the breathtaking shores of Lake Atitlan, Prechtel met Nicolas Chiviliu Tacaxoy--perhaps the most famous shaman in Tzutujil history--who believed Prechtel was the new student he had asked the gods to provide. For the next thirteen years, Prechtel studied...