I saw this a while ago on reddit and honestly thought this is a cashgrab.
I don't mean to be rude, but I thought it has very exagerated descriptions of the effects, and it seemed like it was written by an LLM not a human author. It didn't feel well researched or even proof-read.
And, like Transform said, most, if not all of that knowledge was developed for free in here. I don't think this has a place in here.
(I might be wrong, and this might not be the same book I saw on reddit, but I do think it's the same one)