Jon Hardesty
New
K. Anders Ericsson has some excellent research papers on excellence and what he calls "deliberate practice." He also, has written some articles in golf research books...you will have to look that one up though. The Physics of Golf is a good read. All of Rotella's stuff is good. Gio Valiante has a good book (mental.) The Talent Code is pretty good. The Full Swing by Jack Nicklaus (great pictures.) Michael Hebron's books are a good read.