Written during the Tang dynasty, this unusual tantric guide documents a sexual tantra that is thought to have been practiced by kings for several dynasties, before losing favor to a more ascetic approach to Taoism. According to legend, the author was last seen on the edge of a precipice, clasping the book to his chest, and proclaiming the sincerity of his practice. Translated into English for the first time, this illuminating text carefully describes the methods of this sexual internal alchemy...
