: Originally published by Thorsons (1991) and later Weiser Books (1999).

: Ashcroft-Nowicki argues that sex was once inseparable from religion in the ancient world. The book aims to strip away modern taboos and "cursing of the flesh" to return sex to its status as a creative, divine energy.

: The "Tree" in the title refers to the Kabbalistic Tree of Life . The author maps sexual practices and rituals onto this system, using its various paths and spheres ( Sephiroth ) as a guide for spiritual ascent through ecstasy. What’s Inside?

: Serious and esoteric, focusing on the ritualistic and psychological layers of intimacy rather than just physical mechanics.