I am a huge fan of Pelz's Short Game Bible. I recently read his Damage Control book, which was good reenforcement for stuff I already knew. That being said I was anxiously awaiting this book, which I have finally been reading through.
Unfortunately, I find most of the book not worth the time. At this point I'm not sure if I'll even finish it. Unlike the short game book, where I found value in all the scientific analysis, here it feels contrived and overdone. Many of the graphics are unnecessary, and he *really* goes out of his way to define terminology that (IMHO) adds little or nothing to the conversation.
In the end, he is advocating a pendulum by creating a straight vertical line from the shoulder to the hands. I'm pretty confident I know where he is going, because it is how I was taught to putt in the 90s (but no longer adhere to). I also know that (for me) even with this pendulum, trying to keep the putter head square to the target line at every position requires too much effort.
My recommendation for this book is to skim through it, take what you will from it, and quickly move on.