With specialization in stamp collecting even at an early stage, interest in commemorative issues has been on the increase. This is for that definitely specialized market. The data is intended to answer specific questions:- what does the stamp commemorate, and how does it contribute to knowledge of American history background; what do the stamps look like (there are actual photographs of everyone). Accompanying each photograph is the basic information, Scott catalog number, denomination, color, year of issue. There is an occasional hint as to rarity, but no indication as to value. A final chapter lists sources of designs. Here's one way to tie a hobby to history. The scope of coverage is wide:- historical events, personages, industrial events, regional recognition, famous Americans in the arts, tribute to the armed services, to overrun countries, and so on. The largest categories belong in the large commemorative sets.