
2026
2026
2026
2025
A Sigma Force Novel
2024
2023
2023
2022
2022
2021
New and Classic Short Fiction
2020
2020
2019
2017
2017
2016
2016
2016
2015
2015
2015
The Howling Sphinx, The Skull King's Shadow – Orphan Siblings Explore Ancient Mayan and Egyptian Mysteries in Archaeology Adventures for Kids
2014
2014
2014
2014
2014
2013
2013
2013
2013
2012
2012
2012
2012
A Sigma Force Novel
2011
2011
2011
2010
2010
2009
2009
2009
2008
2008
2007
Kowalski's in Love, Man Catch, Sacrificial Lion, Operation Northwoods, and Success of a Mission
2006
2006
2006
2005
2004