"Tim, There are three basic types of grips; the interlocking used by few; the overlapping used by many; and the 10 fingered grip which I recommend for most people. I believe that the interlocking grip gives you 8 fingers of power pressure on the shaft; the overlapping grip gives you 9 fingers, and the 10 fingered grip ( baseball ) gives you all 10 fingers of power control on the shaft. Of the three grips, the 10 fingered grip gives you the most power. To give you a very blunt example; If you were chopping down a tree would you use an interlocking, overlapping or a 10 fingered grip, think about it. But in reality it doesn't matter which type of grip you use, but which ever grip you choose, must be the one that allows you to bring the club face through the ball straight, period! If you have any further questions, contact you local PGA Professional." - AJ Molitor, Teaching Professional

"The best book you can find is Understanding the Golf Swing by Manuel de la Torre. It is simple, easy to understand and easy to produce." 
- Pat Kimball, Teaching Professional

Tim: For books that will help you with everything from the grip to ball flight control, please have a look at golfbetterproductions.com. A good grip takes photos to show you, but you want to make sure that the v's formed by the crease between each hand's thumb and index finger point to your right shoulder assuming you're right handed. Remember that you're only holding the club, not squeezing it. Golfers do far more damage to their game by simply holding the club too tightly than any other error. Hope this helps." - John Dunigan, Teaching Professional