Dave Pelz putting bible : 4 stars for great content. You probably already know a lot of the issues with putting, but this will definitely add some more things to consider. I like the stats and data on what the pros experience. Lots of exercises given to help refine the different areas of putting. I believe most of friends and I focus on getting the speed of the greens before the game and warming up muscle memory. But the book has exercises showing there are other things to work on.
1 star deduction … it is a little too conversational and repetitive, so this is more about the writing style than the content. Also, there are a couple of things and exercises that I’ve learned over the years that are not discussed in the book. For example, popping a chalk line and seeing if you can put straight, which also shows you how your putt drifts if you hit off center (by as little as a 1/8″). Or how to putt with feet at 45 degrees to target so that the pivot point of the putt is one shoulder socket (as opposed to trying to make 2 shoulders lock-in as one effective pivot point) and helps take the putter straight back for a longer distance.
So it wasn’t a complete ‘bible’ … but again, I gave it 4 stars overall. I mostly enjoyed reading it and I would recommend it to others that really want to understand the nuances of putting.