This is a fascinating book, but I suspect that to truly appreciate it you need to have a background in hermetic magic and an understanding of the concept of the Holy Guardian Angel as understood in Thelema (the latter of which I can not claim to have). In order to carry out the central ritual -- an elaborate working involving sex magic (either as part of a heterosexual couple, homosexual couple, or solo) -- you need to be committed enough to do some serious prep work and allow at least a year for the full effects to radiate out into your life. It's a book for advanced magicians -- or those who aspire to become so.

This book will not provide readers with "magical" tips for enhancing lovemaking, teach how to cast spells using sexual ritual, or other popular topics.

I have no idea why the word "Tantra" in the title. This book does not teach Tantra, nor does it seem to draw on it in a meaningful way, so unless I missed something significant. I'm surprised that respected authors like these seem to have used it as a buzz word to garner attention. (I can't think of any other reason to put it in the title unless to show up in search engine listings.)

The final chapter, "Sexual Magic: A Chaos Perspective" provided some intriguing food for thought about the importance of escaping from the psychological traps which can plague and undermine our personal development, especially in the area of relationships.