| title | ISBN-13 | year of publication |
|---|---|---|
| Blue Holes to Terror | 978-1-930928-61-9 | 2001 |
| Blues Holes to Terror, 2nd edition | 978-1-933720-28-9 | 2007 |
| Deadly Challenge, 2nd ed. | 978-1-933720-44-9 | 2008 |
| Deadly Challenge | 978-1-930928-76-3 | 2002 |
| Forces of Evil, 3rd ed. | 978-1-933720-06-7 | 2007 |
| Forces of Evil | 978-1-932300-10-9 | 2003 |
| Forces of Evil | 978-1-930928-07-7 | 2000 |
| Hidden Enemies | 978-1-933720-60-9 | 2009 |
| The Visitors, 2nd ed | 978-1-933720-51-7 | 2009 |
| The Visitors | 978-1-932300-27-7 | 2004 |