The main inspiration for this book seems to be derived from the works of an African/American esotericism and medium called Paschal Beverley Randolph, who lived on the Nineteenth Century. I cannot either endorse or dispute the scholarship behind the ideas put forward here - at the time he is said to have been considered bold for being so explicit about his ideas forvsexual alchemy.
Apparently the ancient Egyptian adepts of this path believed that monogamy was important for this kind of sexual soul work, in which the chakras are slowly opened and, as with tantra, orgasm delayed until the energy at the base of the spine, kundalini, has infused all of the chakras.
Unlike the case with similar sytems from India, however, The Egyptian system is said here to recognise extra chakras at the base of the feet, as well as some places above the head. In addition, the Egyptians recognised several components of the human soul in addition to the more well-known Ka and Ba. This was important not only for their burial practises, but for their sexual alchemy mysteries too. According to this book, it was important for them not just to seek an ideal twin soul partner and to reach ecstasy together: the aim was for each individual to enjoy communion with their immortal component soul and beyond that still, with the ground of crestion: this was the sacred marriage.
For those who also entertain such lofty aspirations to their love among, the author of this book, Judy Hall, prescribes crystals to go with each chakra as they are opened, with a commentary on each of the original instructions. Judy Hall makes it clear that she does believe in the efficacy of repetition.
Rituals are also given for cutting the (karmic) ties that bind in any relationship that is past its sell-by date. The Egyptians may have believed that an original soul union might span incarnations to come, but it seems even they recognised when it might be time to move on.
The rest would be up to the reader, to decide how far to take any of this

You know you will get a good understanding of the subject that Judy Hall is covering, as she is a well versed author on many spiritual customs, ancient practices, crystal meanings, uses and talismans.

A very good information book. I wasn't sure what to expect but I found the information very interesting.

Not at all what I was expectimg while reading this book. Couldn't get into it. Just not my kind of book

Whoops! I thought I was reading the fiction version by Judy Hall, instead of this instructional manual. I've never gotten into crystals and after reading the "warnings" at the beginning, I wasn't comfortable to attempt these instructions.

I don't plan to mess up ratings on Goodreads/ Amazon, since I didn't follow directions or read the book in full. Best wishes to the author!