How Yardage Books Changed the Game of Golf: USA Today covers the 50-year history of yardage books, the "postcard-sized drawings, notations and scribbles" that tell a golfer how a course plays. Carrying them was popularized by Jack Nicklaus when he left the amateur ranks in 1962, but another golfer wasn't terribly fond of them at the time. "If I had been a ruling body I would have made them illegal," said Arnold Palmer. "I didn't have much choice but to go along." He did, and Palmer's caddy George Lucas has become the foremost seller of pro yardage books, which recently began to be sold to the public.