Well, I finished the book and decided to mull it over for a while. Unfortunately, the last few chapters mostly ruined my impression. It is hard to explain why. Perhaps it was the general tone of meanness and condescension I sensed in the writing early on and which seemed to escalate toward the end of the book. Granted, there are a few short chapters pertaining to alternate theories (IDI/BDI) which the author makes it very clear he finds implausible to the point of being ridiculous, so it didn't surprise me that those scenarious are written with a big dose of sarcasm and disdain.
Or perhaps I mistook the author's emotional tone and it was meant to convey his "righteous indignation" about the brutality of the murder itself and complete lack of justice in this case. Totally understandable, but if that's what the author truly meant, he could have conveyed it better IMO.
The other problems I had with the book were several factual errors - which the author kept re-stating and continued to weave into his theory on an as-needed basis. For example: in various chapters, he states the front door had been carelessly left unlocked the night of the murder - which to the best of my knowledge is simply Not True. Then he weaves that error together with another error that the house alarm system had also been turned off that night. Partially true, but the R's stated publicly on several occasions that they had not been using the house alarm system for quite a long time because of its loud noise within the house and due to accidental tripping of the alarm. One story in particular they mentioned JBR accidentally tripping the alarm out in the garage when she tried to climb up and press the garage door button.
But then, to make matters worse, the author repeats both of those errors in tandem several times all the way to the end of the book when he summarizes how he believes all the pieces of the puzzle finally fit together with his theory.
Plus there are several other inaccuracies which I wont bother mentioning only because I don't have the patience to make a big list lol.
IIRC at the beginning of the book, the author says he spent 9 years studying the case. Even if his research was directed primarily toward the psychological components of the crime and the observed behaviors of key persons, it would have been wise for this author to find a research assistant to clean up the factual errors for him. I can think of several of our posters here at WS who could have done that just off the top of their heads!
Now, in an effort to find something positive to say about the book... I still agree with some of the author's interpretations of possible "hidden clues" in the ransom note as well as J's & P's observed behaviors on the morning of the 26th. Most of that is found in Chapter 4, iirc. That part, I do recommend reading.
But alas, if you go to the amazon site and read through the customer reviews (including "comments" to reviews) it appears the author could be participating. Who knows if it's really L.S. or an impersonator or troll. You can click on the profile to read that L.S. person's own reviews which include critical reviews (May 2015) of both PMPT and Kolar's FF, as well as positive reviews in previous years for a couple of other (seemingly unrelated) books and movies and misc. items. To each his own, of course. But if that profile really is the author, he might want to consider deleting some of his public comments and avoid getting into arguments with any of his readers.
ALL Just my opinion