Coin & Currency Collector Reference Guides - 4 book set - includes Friedberg 

Book #1 - Paper Money of the United States by Arthur L. and Ira S. Friedberg.  This 332- page hard covered book is a complete illustrated guide with valuations and is the standard reference work on paper money based on the original work by Robert Friedberg.  This is the seventeenth edition published in 2004.  This book has some slight wear on the spine as shown in the pictures.  

Book #2 - Standard Guide to Small-Size U.S. Paper Money by John Schwartz and Scott Lindquist.  Published in 2009.  Original price is $32.99.  This book is in excellent condition.  

Books 3 & 4 - Blue books for United States coins.  One book was published in 1962 and the other was published in 1979.  Both books show slight wear as depicted in the pictures.  

** This is an impressive collection of reference guides that is not only interesting, but educational.