Book excerpt: The United States Zip Code Atlas is an indispensable resource for anyone involved in direct marketing, sales, media selection, or transportation. Individual state maps are the core of the atlas. Each state map shows 3-digit zip code areas clearly outlined in a second color. The indexes give 5-digit zip codes. The material is further enhanced by 22 pages of statistical and demographic data, organized by 3-digit zip code. As a special bonus, a full-size, full-color U.S. county-town zip code map is included(a $36.00 value).