The Art and Science of Breaking 90 - A Guide to Modern Golf Course Strategy and Equipment was written By Kevin Downey the president of Innovex Golf Company. Downey has been in the golf business for more than 10 years as a club professional and in sales for Callaway Golf.

Part one of the book contains chapters about course strategy,  ways to lower your score without changing your swing, and why we shoot bad scores. Part two tells about modern equipment, how to put a set of clubs together that will work for you, golf balls and driver technology, and wedge design.

The goal of this book is to have you shooting lower scores immediately. After reading it I would have to say it has done it's job. Your goal when out on the golf course should be to shoot the lowest score possible. You should not be out there trying things that have little or no chance of working. Save that practicing for the driving range. The Art and Science of Breaking 90 points out situations where most golfers waste strokes by not playing the percentages. If you concentrate on playing for the best score instead of banging away at every opportunity, you will find many strokes to be saved. 

The equipment improvement is a longer term goal. You may not be able to run out and buy all new golf clubs, but so can systematically replace clubs as needed with ones that make more sense. You can get clubs that are custom fitted, replace long irons with hybrids, and get the right number of wedges for you.

You can get more info at  www.innovexgolf.com