- 2008: _Warman's Coins &Currency Field Guide_, Krause. ISBN 978-0-89689-575-5
- 2010: _Warman's Coins &Currency Field Guide_, 2. udgave , Krause Publikation ISBN 978-1-4402-1985-0
- 2017: _Standard Catalog of United States Paper Money,_ 39. udgave, med William Brandimore III, Neil Shafer., Krause Publication. ISBN 978-1-4402-4819-6
- 2018: _Warman's Civil War Collectibles Field Guide_, med Bill Benke, Krause Publications. ISBN 978-1-4402-4700-7
- 2019: _US Paper Money Errors (Red Book)_ med Neil S Shafer, Jeff Ambio, Krause Publications, ISBN 978-1-4402-5492-0
- 2020: _Warman's World Paper Money Field Guide,_ Krause Publications. ISBN 978-1-4402-5935-2
- 2020: _Black Friday:The Untold Story of the Most Shocking Epidemic of World War I_, St. Matin's Press ISBN 978-1-250-25256-0,
- 2021: _Warman's Firearms Field Guide,_ Krause Publications. ISBN 978-1-4402-1927-0 med Robert G. Segel og Robert Campbell II
Fiktion
- 2022: Bloodlines:a post-apokalyptisk thriller_ 3-bogsserie, John Meikle Publications
* Bog 1:_Ashes of America . ISBN 979-8-8372-8342-2
>*_Bog 2:_Shadows of Oblivion_*. ISBN 979-8-8372-0270-0
>*_Bog 3:_Skæbnehvisker_*. ISBN 979-8-8372-6920-1