| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Gods, Goddesses, and Monsters: An Encyclopedia of World Mythology | 978-0-439-04289-5 | 2000 |
| O, Say Can You See? America's Symbols, Landmarks, And Important Words | 978-0-439-59360-1 | 2007 |
| O, Say Can You See?: America's Symbols, Landmarks, and Inspiring Words | 978-0-439-42450-9 | 2004 |
| What Time Is It? A Book Of Math Riddles | 978-0-590-12008-1 | 2000 |