We all know jumping straight into research without context is difficult, especially since some people here have been researching for years.
Hopefully this thread can be used to get people up to speed and get those questions answered by our more knowledgeable users.
I actually found the complete series on his site. All seem like worthy titles worth reading to me. In my opinion, People tend to also hate on people such as Randall Carlson and Graham Hancock and I absolutely enjoy their work. Neither have credibility but both tell an amazing story. Randall says he made most of his discoveries tripping mushrooms in the middle of the desert.
I don't regret reading the books, they were fascinating. Several of the sites he documented I had never heard of prior, and yes they actually exist. Even if 80% is bullshit the other 20 is incredible. I just wanted to be clear I don't support in any way his conclusions, or desire anyone pay good money to him or his associates.