Over the course of the last millennium in Tibet, some tantric yogins have taken on norm-overturning modes of behavior, including provoking others to violence, publicly consuming filth, having sex, and dressing in human remains. While these individuals were called "mad," their apparent mental unwellness was not seen as resulting from any unfortunate circumstance, but symptomatic of having achieved a higher state of existence through religious practice. This book is the first comprehensive study of these "holy madmen," who have captured the imaginations of Tibetans and Westerners alike.