There is a really good book Called the "7 Laws of the Golf Swing" by nick bradley.. Its honestly one of the best books ive read on the game..

i also suggest to get the 5 fundamentals by ben hogan.. EVERY golfer has this book..

I also suggest to get the Greg Norman Secret to teach you correct wrist angle during your swing..there on ebay for like 8 bux and are a super investment to get the correct wrist angle and lagged position on the downswing. It will teach muscle memory which is very important..without this you will never really get the "feel" of the correct wrist position a pro feels on his swing..If you could only get one item from the list it would be this one then,..

You could be topping the ball from looking up too fast. Always keep the head down and still..NEVER hit the ball with your hands, don't try to "throw" the clubhead to the ball with the hands..I am not sure, but I can almost guarantee you that this is why your topping..

A good way to get rid of that tendancy to try to whack the ball with the hands is to(when you got your grip figured out) to take the right first finger and thumb OFF the club.. On the left hand the most pressure will be with the last 3 fingers(middle, index and pinkie) the forefinger and thumb should just be rested(use the thumb and forefinger on the the left hand almost like "pinchers" comming together on the shaft)..Anyway by doing this excercise you will get the feeling of the hands being used as a whole and using the body and the hips to get the club back to the ball rather than the hands... the right hand is the greatest killer to the golf swing, there must be 50% less pressure on the right hand than the left hand..I think you get the idea of what im saying lol.., ben hogan once said he wished humans had 3 or 4 arms to hold the club..