71 years after its introduction, the 23rd edition of *Paper Money of the United States* remains the standard reference book on American currency. In 1953, 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 336 pages feature nearly 1,000 color photos of banknotes from America\'s greatest currency collections, as well as most of the greatest rarities, from the first year of paper money to the present. Completely revised and updated. 23rd edition includes: * Large Size Notes, Fractional Currency, Small Size Notes, Encased Postage Stamps, Confederate States, Colonial and Continental Currency, Treasury Notes from 1812 to 1861, United States paper money error notes, Postage Envelopes, Postal Notes, and Uncut Sheets * Market valuations in up to seven states of preservation * 990+ color photos * Universally-used Friedberg Numbering System™, the standard method for cataloging, describing, buying and selling U.S. currency * Full listing of note-issuing National Banks with number of notes known * Complete signature listings for U.S. currency * Hardcover 12 x 8.5 inches * 336 pages *Paper Money of the United States* introduced innovations never before attempted. Robert Friedberg was the first to standardize this subject and gave this book a permanent place on reference shelves. For the past forty years, it has been completely revised and edited by Arthur Friedberg, the Honorary President of the International Association of Professional Numismatists and one of Coin World magazine\'s \"Most Influential People in Numismatics, 1960-2020”; and Ira Friedberg.