Most of the interviews and info from the book were available on utube until about 2019. There was a woman radio host that did a number of her shows covering this, kind of like the radio show Coast to Coast, during the 60s and 70s. I can't find the videos online now. Maybe bitchute might still have them
Edit- actually CtC did an interview with the author in 2020 maybe. The author himself had done a reading series from the books on bitchute in maybe 2019 that a friend shared with me in fall of that year, since we had talked about the book previously
CtC interview