Now in its 37th edition, The Postal Service Guide to U.S. Stamps is an indispensable handbook for philatelists and hobbyists everywhere. The only fully-illustrated, four-color guide to U.S. stamps, this official publication from the United States Postal Service provides the most comprehensive information available about the U.S. stamp program and its vivid history. Every category of U.S. stamp is included—definitive, commemorative, airmail, duck stamps, and stamped envelopes—and the book is organized into easy-to-use, color-coded sections for quick access.