I have bought the book, and here is my review.
The book has 10 pages and many images. The method is new to me because I have no experience related to 3D. So I tried to implement it using the Android app and Windows software.
Positive: It is something new to me; I might have seen blogs mentioned related to it but probably overlooked it because of 3D. I am introduced to a few new apps.
Negative: None of the images used in the book, including the steps to implement the method and earning proof, belong to the author; all are taken from the internet. I highly doubt if the author has really implemented it. The author has mentioned/accepted it on page#4 of the book, related to steps to implement and on page#9, related to the earning.
Verdict: 5/10
I feel that it requires skills related to 3D. Please note that "shadow" is a headache in 3D. If the author has really implemented and making money, then I wonder why he has used pics/screenshots from the internet, including steps to implement and money proof!