Maybe the greatest player ever. But, how he put his name to this book is an abomination. To this day, I'm still trying to undo the misteachings of this book. It was the reason why my swing was divided into about 100 different phases and why I got myself into knots as I swung. Golf shouldn't be that hard and its NOT. My golf pro teacher calls the book a disgrace. Stick to lessons and practice and the true, classic golf instruction texts that have stood the test of time.