Jensen
Tour Rookie
Look at Plane Truth by Jim Hardy which explains the difference between one plane (more around the body) and two plane (more upright). Both are effective and both can be taught effectively by a good professional depending on how a pupil swings the club
Thanks Homer, I've already got Plane Truth by Jim Hardy which I regard as my golfing bible.
The Coach that I'm using is a Level 2 Plane Truth certified teacher.