The Official Blackbook Price Guide to United States Postage Stamps makes it easy to identify and price the stamps that you already own, as well as the stamps that you want to buy. This is the most comprehensive pocket stamp guide available, listing the current value of every U.S. postage stamp along with its illustration. This in-depth source covers every aspect of stamp collecting, including how to buy, sell, and grade stamps; how to find a stamp error and spot a fake; and a complete listing of stamp publications and organizations. Book jacket.