I enjoyed Andrew Thomas' first book, "Hidden in Plain Sight", rather a lot, if only because it was a refreshing change from the sometimes dogmatic mainstream. In recent decades it does feel that Physics has become somewhat mired in problems. String theory seems to have swallowed whole careers with little in the way of tangible result. Thus far at least, "dark energy" & "dark matter" are really just alternative terms for "unknown, unexplained & not yet actually detected". These mysterious invisible explanations for things we don't understand may yet go the way of "phlogiston" and "the ether".
Anyway, having enjoyed his first book, I decided to buy his second and I think I enjoyed it even more. Could the theory that Andrew Thomas puts forward actually be right? Who knows, but in my opinion he puts forward a rather interesting argument. When I first read it, I found his conclusion rather jaw-dropping. At least it was a satisfying conclusion, like the revelation at the end of a good murder mystery. Certainly thought-provoking. I need to read it again. The axiom about "if it's too good to be true..." is rarely wrong, and this theory almost seems too good to be true.
While I was reading, I found myself thinking about a concept from Chaos Theory that he doesn't mention - attractors in dynamical systems. Is the Schwarzschild radius real? Well, yes. Could it be a rather important attractor? Perhaps. Can it really explain so much about some many of the current mysteries in physics, with just a tiny tweak to Relativity? Well, maybe. Or maybe not. But for 99p on a Kindle, it's certainly worth a read so you can try to decide for yourself!
I have to note that the Kindle edition at least has poor editing and proof-reading in places, (possibly because he can't afford an editor at these prices) but it didn't affect my enjoyment.
All in all, an enjoyable, stimulating & thought-provoking read.