John Horgan, author of the best-selling The End of Science, chronicles the most advanced research into the mechanics—and meaning—of mystical experiences. How do trances, visions, prayer, satori, and other mystical experiences "work"? What induces and defines them? Is there a scientific explanation for religious mysteries and transcendent meditation? John Horgan investigates a wide range of fields — chemistry, neuroscience, psychology, anthropology, theology, and more — to narrow the gap between reason and mystical phenomena.