I'm probably being a bit too hard on this book giving it 3 stars. However, given the current state of the UFO world this book really didn't add much. It was updated recently due to the 2021 rumors of the pentagon releasing a general UFO/UAP report sometime this summer so as to be more of the background on who and what government informants have added to this emerging story.
Nevertheless, Mr Cameron doesn't do a very good job of clearly spelling out the story logically. Yes, he does have a lot of reference material and contacts in the incestuous UFO community, but, drops so many names and events that, as a reader, would be very confusing if you knew nothing about the backstory before. Additionally, if you do know what's been happening over the last 40 years then this book doesn't add much more that what you may have already read or heard - same old, same old -> Roswell, MJ-12, ABC's UFOs Live, Falcon, Bill Cooper, Ron Pandolfi, Moore and Shandera, Bob Lazar, Paul Hellyear, Richard Doty, etc. If you know what I'm talking about then you understand why this isn't adding much to existing UFO literature. But, if you don't, this is not the right book to start with - names, dates, accusations, innuendo, rumors, misiformation, disinformation - I could go on. (One glaring omission from this book was Lt Col Philip Corso who detailed much of the government involvement in this saga with his book).
If you are interested in the name list from this book then it might add some more connections to the ongoing UFO speculation. Otherwise, it will only confuse you.