| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Vietnam Air War: 25 Rarely Told Stories | 978-0-913337-63-9 (0-913337-63-3) | 2007 |
| Vietnam War Facts Quiz: 21st Century Edition | 978-0-913337-58-5 (0-913337-58-7) | 2006 |
| World War II Facts Quiz: Europe | 978-0-913337-59-2 (0-913337-59-5) | 2006 |