While this book was written quite a few years ago, the basic science behind it is solid.
Using high speed cameras, the authors analyze every aspect of the golf swing dispelling many myths behind the swing. It looks at what makes up swing speed, how certain ball flight is achieved, and much more.
If you're a Dave Pelz fan, you'll love this book. I find Pelz and the authors here to be of similar mind and approach.
This book really isn't for teaching your golf swing, however. There really aren't any drills for you to do, but it explains what you want to achieve, just not HOW to do it.
The science behind this book personally help me drop from a 6 to a 4 index, and improve my driving accuracy from about 45% to 60%, IN ONE YEAR. The reason? My instructor was wrong in talking about ball flight and what causes the ball to do certain things. This caused me to try to adjust things in my swing that didn't need adjusting.