Well, I finished the book and took a day to think about it.
First, DeSouza states that "extradimensionality" is the key to everything.
How many times have we examined an event or situation and noted that if the persons involved were aware of hyperdimensional realities, 4D, etc, they would understand better what was going on? We say it all the time. And we say it about the low-level understanding of many figures we like who yet lack that one piece of information that would open their understanding. Jordan Peterson, for example. And many others. If people understood the potential and actual manipulation capabilities of 4D, they would be better able to navigate our reality.
So, on that point, DeSouza is 100% correct.
In chapter 2 he cites Jacques Vallee's "Inter-dimensional" hypothesis, i.e. alternate realities, parallel universes that coexist beside our own. DeSouza proposes that they do not come into our world and openly communicate with our leaders because THEY CAN'T. That is, they are not "fully physical".
On that, again, we agree. Cs have said so and their explanations cover the phenomena observed. They call it "variability of physicality."
On page 29 he makes his first statement indicating that he does not think the "aliens" are necessarily nice guys. He refers to decent people who "want to believe that it's always a positive thing to reach out to our space brothers with a hand of frinedship"... and then says "There are astral predators out there in the Ekashic wilderness."
By the way, what is "Ekashic"? I've never heard that term before. I've always heard Akashic.
In his review of the Travis Walton incident, he states that he now believes that Travis, because of his aggressive pursuit of the UFO he witnessed, was accidentally killed by a discharge of plasmic energy. He explains this by explaining the nature of the gray aliens as "very limited and programmed creatures." (Again, we agree.) He hypothesizes that the grays were attempting to return the situation to the status quo when they revived Travis because they "cannot act or by omission cause events that are clearly outside their mission parameters."
He further adds to this hypothesis by pointing out that "Travis did not experience many of the horribly invasive procedures that many abductees report." This suggests to DeSouza that a standard abduction was not part of the mission of the "aliens" that interacted with Travis.
Then he proposes that "the first three Greys encountered by Travis Walton are the exact same entities he encountered with the second group of three Nordic beings." That is, they "changed form". He notes that the three Nordics "failed to live up to the standards of every Nordic Contactee experience."
On this point, I disagree but I think this should be a question for the Cs. Do the grays ever change form like DeSouza suggests? Can they?
My explanation would be that three is the usual number of these "alien teams". (Why is that?) and there were two teams of two different types of beings. First, the "cybergenetic probes", as the Cs call the grays, and a team of hybrids that look like Nordics. So, another question for Cs: do some hybrids look like Nordics? (That may already be covered.) And also, was Travis Walton revived by the aliens because he was accidentally killed by a plasma beam? If not, what was going on there?
Anyway, if I'm right, we see here how DeSouza tends to leap to assumptions. It may work a lot of the time in FBI investigations, but we are dealing with hyperdimensional realities and I think some care should be taken to keep that in mind. He could just as easily have proposed what I just described as an alternate hypothesis, but he did not. He made the assumption that the grays could and did transform themselves into Nordics and he was off and running with the idea that "the idea that "Alien Races" are nothing more than a convenience... For Alien Visitors, changing forms may be as easy as changing an overcoat is for humans." So, we need to ask Cs if that is true.
This misstep in his logic seems to me to have serious implications for his overall thesis.
In chapter 5, he discusses MO and changes in MO. This is standard criminal investigation procedure. You try to establish the MO and then note when and if there are shifts in that MO. MO being, of course, Modus Operandi, or the PATTERN of the work of an individual or group.
DeSouza notes that "The components of the M.O. are two: the 'pattern actions' that wrap around the center and at the center is 'the signature. While the Mo.O. pattern actions can changed based upon the killer's experience or opportunity, 'the signature' is the perpetrator's calling card. The signature tends to remain constant even if the M.O. pattern actions change."
He then gives the example of a serial killer who always kills young blonde women, but then, when none are available to him, he makes do with a brunette. However, he kills the brunette the same way he killed the blondes and leaves them in the same condition. So the killing of blondes would be the M.O., but the way they are killed and left is the "signature." So, the alteration in M.O. is a signal that something has changed in the personal life or environment of the actor.
The point DeSouza is making here is that the change in M.O. is what suggested to him that what was thought as an "alien abduction" was not, in fact a planned abduction but was actually a rescue. The Grays were "fixing what was broken" by accident.
He then goes on to point out that there is a great shift in the alien M.O. overall happening now. That is, a massive explosion in their activity on the earth. He suggests this signals a change: "They are no longer gathering data and collecting soul prints. They are, instead, now forming a ubiquitous constant and inescapable presence everywhere in human society as they prepare for the Next Shift yet to come."
But, we can't pose questions about a Shift in activity or collecting data and soul prints without know more about what DeSouza means by those terms.
Anybody else want to pick up on those topics and see what he has said and what questions we can extract?
Added: That is, find all his references to "collecting data and soul prints" to develop what he has finally said about that so we can query it.