A former president of the American Numismatic Association maintains that knowledge about the historical, technical, and artistic aspects of U.S. paper currency enhances its value beyond price. Bowers provides details on Federally-issued paper money from 1861 to the present and tips on how to be a smart collector. Arranged like coin references with categories of series and signature combinations arranged chronologically within category, estimated number and price by grade are given for each denominations. The reference also covers 19th century postage and fractional currency, types of errors, currency issued by the Continental Congress, signatures on U.S. currency since 1861, and terms of service of Treasury officials since 1913. Reference notes, a glossary, and ads for currency dealers complete the guide. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)