Now in its 36th edition, The Postal Service Guide to US Stamps is the only fully-illustrated, four-color guide to U.S. stamps for philatelists and hobbyists everywhere. 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, stamped envelopes—and organized into easy-to-use, color-coded sections for quick access.