Encyclopedia of United States Stamps and Stamp Collecting, Second Edition. The most comprehensive introduction and guide to United States Stamps ever written; fully revised and updated; for beginners and veteran collectors alike. Illustrated in full color; 769 pages (2016), hardbound, 9.3×6.5in.

Describes the origin of the concept of Supplementary Mail and presents previously unknown information on the beginnings and early operation of Supplementary Mail service in New York and ten other cities.  Illustrated in full color; 144 pages (2009), Hardbound.