The standard reference work on paper money PAPER MONEY OF THE UNITED STATES -
A COMPLETE ILLUSTRATED GUIDE WITH VALUATIONS
Eighteenth (2006-2007) Edition by Arthur L. and Ira S. Friedberg
based on the original work by Robert Friedberg (1912-1963)
Includes:
large size notes * fractional currency * small size notes * encased postage stamps from the first year of paper money (1861) to the present
Also contains sections on confederate states notes, colonial and continental currency, error notes