Golf pro Bill Kroen offers tips on swinging, chipping, putting, strategizing, setting up, positioning, and more in the Bill Kroen's Golf Tip-A-Day Calendar. Written for both the novice and seasoned golfer, this calendar can help improve anyone's game. Published for sixteen years Bill Kroen is the author of Golf Dynamics and The New Why Book of Golf. According to the National Golf Foundation, there are 26.2 million golfers in the United States. According to the National Golf Foundation, golfers spend $23.5 billion on equipment and fees each year.