The book was published at the Kindle Store.
It is the English version.
This book is wonderful wisdom of ancient India into one volume.
I examined the relationship between Tantra and Kama Sutra, and further judged from Japan’s AV experience.
Using numerous CG images.
We sell it at Kindle store in various countries around the world.
The main sites are as follows.
Please try searching for “B07CQ3Y57J” on Amazon in your country.
Perhaps it’s an adult page.
The price is about 4.99USD.