Series
| Series Name | Release Date | Product Count |
|---|---|---|
| World's Weirdest Animals | 2015-08-01 | 9 |
| World War I | 2004-01-01 | 14 |
| World War II | 2011-09-01 | 7 |
| World Wonders | 2017-12-15 | 7 |
| Wrestling Biographies | 2017-12-15 | 14 |
| X-Men: Evolution | 2005-01-01 | 5 |
| X-Men: First Class | 2007-09-01 | 10 |
| Xtreme Adventure | 2014-01-01 | 7 |
| Xtreme Aircraft | 2021-12-15 | 7 |
| Xtreme Armed Forces | 2020-12-15 | 7 |
| Xtreme Cars | 2022-08-01 | 7 |
| Xtreme Dance | 2011-01-01 | 7 |
| Xtreme Dinosaurs | 2017-12-15 | 7 |
| Xtreme Fish | 2014-08-01 | 7 |
| Xtreme Fishing | 2015-01-01 | 7 |
| Xtreme Insects | 2015-01-01 | 14 |
| Xtreme Jobs | 2015-08-01 | 7 |
| Xtreme Military Aircraft | 2012-01-01 | 14 |
| Xtreme Moments in Sports | 2023-12-15 | 7 |
| Xtreme Monsters | 2010-09-01 | 7 |
United States Encyclopedias
World of Mythical Beings
Captives of the Reich