Like one of the other reviewers here, I have read, watched or attended countless articles, books, documentaries, TV shows, interviews, abduction researchers, scientists and UFO/UFO conferences-- countless! My bookshelf alone for this topic consists of at least 54 linear feet of books on the topic of UFOs/UAP/aliens and paranormal. And a whole lot more.
I find DeSouza's insights on 'dimensionality' of the phenomenon somewhat like Jacques Vallee's insights. I trust the author has evidence from his work with the FBI that he cannot include or cite. That is my one fault with the book. Some of his concepts are not backed up by evidence. It reads more like opinion, or perhaps informed opinion, but the 'informed' is not explained. Three examples" 1) predicting extra-dimensional "aliens" take over the world via our 'sleep and dreams'? or 2) they plop down on Earth chimera creatures that are animal, part human?? or 3) that there is no other life or physical alien in all the 200 billion trillion stars and about 2 trillion galaxies in the universe???... Where or why does this seem plausible? None of this is explained with evidence for WHY this could or would be so.
That being said, I do believe this is a fascinating read and a good book to expand the possibilities of how we think about "aliens" and where they are from. And like Vallee, I do think there is another dimensional explanation to it all. OR, their science is so advanced that to us it appears dimensional, but in reality, it is just advanced technology we can't really comprehend.
I tend to believe the middle-way is usually the answer to most conundrums like this, where there is so much unknown. Leaning to one extreme or another extreme is usually not the answer. I tend to think that the answers are some of one side and some of the other side. So, for me, there are "aliens" who are extra-dimensional, and then there are aliens that are very physical, (and perhaps not spiritually advanced as the dimensional aliens). But that there are a mix of both coming to Earth for many different reasons, some good for humans, some terribly bad for humans.
Also, in retirement, I volunteer with astronomy teachers and telescope geeks and it is literally impossible to conceive that this vast universe (data above) is empty of physical lifeforms!! I am with Dr. Ellie Arroway, the character in Contact: expressing her thoughts on the universe and humanity's place in it by stating: "I'll tell you one thing about the universe, though. The universe is a pretty big place. It's bigger than anything anyone has ever dreamed of before. So if it's just us... seems like an awful waste of space. Right?". I agree. No way we are the ONLY physical lifeforms in such a universe.
I do think that the author has given critical thinkers a LOT to think about however, from "carpet stain doctrine" to EPIC (Elite Powers in Control) to the awakened investigative rule of evidence (for science to consider the paranormal), to Earth as a gateway (quantum gate-flux), and P.L.A.S.M.A.S, the double-trick, just to name a few of DeSouza's ideas. Definitely he offers a lot of evidence for these ideas. And the new investigative rules of evidence are those I have heard from other experts including some scientists.
DeSouza has a very thrilling way of presenting some of the stories many of us familiar with in this UAP field, that many of us have heard many times before. So, it is very interesting to read well-known stories or ideas or theories, from his vantage point. For example, "the call that shook the planet," "Travis Walton's abduction," giants, shining shields, MIB, implants, and the crop circle message to humanity.
The latter is my favorite retelling that DeSouza included. He makes the Crabwood Crop Circle all the more powerful, real and believable in his narrative. e.g., "When decoded from binary (ASCII), the message reads: "BEWARE THE BEARERS OF FALSE GIFTS & THEIR BROKEN PROMISES". I really think this was spot on. The fact that he included it in his book speaks well of his content choices. And having had a crop circle not far from where I live, I know they are the real deal.
I agree with DeSouza in his book about "Awakened" individuals with higher frequencies, and that hybrids are already here. David Jacobs says the same about the latter, and Paola Harris says the same about the former, after interviewing countless experiencers. I did think the DeSiouza's 'six percent resolution' had a lot of truth to it. I also thought he had a very insightful "reply" to the extra-dimensonals, on page 197, that could be sent with SETI transmissions or crop circle meditators. I do believe they are coming. The question is who, how, when and why. I am not sure I buy into all of DeSouza's answers. But they are intriguing. Certainly those of us who have had our own personal encounters with non-human entities, have a few ideas as well about that eventuality.
The entire concept of 'soul harvesting' is interesting, but not presented with any historical or scientific evidence. So, I take it as a DeSouza opinion. I suppose it is possible that there are dimensional beings without souls that continue on after they expire. How would they get our soul, and what does that mean for a human? There are just a few of the MANY questions I have on this. Certainly, there are many ancient texts that do not mention this 'soul-stealing' or at least not mentioned by translators of these texts. I would expect another culture or advanced doctrines or canon to be privy to such notions or have had experience of it in some way and document it. For me, as a "alien/dimensional" motivation, it was thus too fuzzy, and not something I think was explained well enough in the book. To begin with I would have to believe that creatures can be 'soul-less' and the how and why of it.. and without more rationale for it, it is something I would entertain as science fiction perhaps.
The only other criticism is that the book REALLY needed an index! I wanted to go back and reread or check some things and without an index I had to keep flipping to find what I wanted to reference. I am a retired medical librarian, and would gladly do an index! Loved the bibliography and additional reading recommendations. I have read most of them but there were titles there I did not have so very useful.
Overall, I do think DeSouza's book was a powerhouse of fascinating ideas, concepts, opinions and insights about this phenomenon and well worth the time to read it.