Paper Money of United States is widely considered the standard reference book on United States paper money. In 1953, the late Robert Friedberg (1912-1963) broke new ground when the Treasury Department granted permission for photographs of American paper money to be printed for the first time. The current edition's 328 pages sets the standard once again by featuring notes from America's greatest currency collections, all reproduced in color. The inaugural edition of Paper Money of the United States also introduced other innovations never before attempted. The subject became standardized and the book earned a permanent place on reference shelves. During the past three decades, it has been completely expanded, revised, and edited by Arthur L. Friedberg and Ira S. Friedberg.

From the first year of Federal paper money, 1861, to the present, the fronts and backs of all classes and types of currency, from 3 cents to 10,000 dollars are illustrated. These are accompanied by text listing, describing and pricing every variety of paper money ever issued, more than 10,000 prices in all. With close to 1,000 color photographs, the result is a complete pictorial, descriptive and numismatic history of the currency of the United States. There are supplemental sections on Continental and Colonial Currency (notes issued from 1680 to 1788), the Treasury Notes of the War of 1812, considered by some to be the first national currency, a comprehensive listing by type of the issues of the Confederate States of America, and sections devoted to paper money errors, postage envelopes, and encased postage stamps. The latter two, along with Fractional Currency, were created to alleviate the shortage of change needed for commerce during the Civil War. The listing in the Appendix of the 14,348 National Banks that existed from 1863 to 1929 also shows the numbers of large size and small size notes known to exist for each note-issuing bank. The Appendix also includes information on uncut sheets of small-size notes, including the modern issues sold by the Bureau of Engraving and Printing.

Paper money collectors depend on the Friedberg Numbering System™, a uniform method of cataloging bank notes that is the international standard for American currency. This numbering shorthand, along with the hundreds of photographs, enables anyone to instantly locate a specific banknote, and allows a dealer to advertise a note without need of extensive description. A distinguished panel of acknowledged experts on paper money has assisted the authors, enabling them to establish accurate and up-to- the minute valuations for all issues.