Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Solid instructional book

John Jacobs provides a solid instructional book. Many instructors fall into either an arm driven or (more popular) body driven swing. While body driven instructors put Jacobs in the arm driven swing category, I believe he's really exactly in the middle. He believes that both are required in the appropriate measure.A big bonus is his sections on troubleshooting on the course (including how lie, slope and club will affect shot direction and shape) and the fixs/faults section. The fixs/faults section is an abbreviated version of his Golf Doctor book, but just as good and a little more simplified (for the better). Technical swing mechanists will find fault with some of the physics of his explanations, but his fixes are based on years of experience and have worked for me.