But yardage books have personality, and every one is different. While they're all designed to fit in a back pocket, some open like novels, while others flip like a steno pad. Some have fancy covers with alluring photos and computer-enhanced 3-D depictions of each hole; others employ line drawings that are a short step up from finger paints.
It is an important thing in golf to make holes look much more difficult than they really are. People get more pleasure in doing a hole which looks almost impossible and yet is not so difficult as it appears.