I'm currently reading this one and found it very hard to get into as the first few chapters are about him developing a system for analysing statistics. However haveing got to the point where I'm trying improvements suggested I can fully understand why he has done this. Having stuck with it I am seeing the benefits on the course. I've only given it 4 stars as I think it could do with the photo's updating.
A book that is worth purchasing. Stick with it from the beginning a follow it through on your first read rather than skipping to the bunker section and you'll be rewarded.
I would also recommend reading Bob Rotella's 'Golf is not a Game of perfect' first as it has helped dramatically to get all the fears out of my game first.Golf is Not a Game of Perfect