| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2000 | 978-0-9663722-0-5 | Maggie Hogan · Cindy Wiggers | The Ultimate Geography And Timeline Guide |
| '' | 978-0-9663722-1-2 | George Wiggers · Hannah Wiggers | Uncle Josh's Outline Map Book |
| 1999 | 978-0-9663722-2-9 | Liberty Wiggers | Historical timeline figures: The ultimate hands-on history activity for all ages |