Series
| Series Name | Release Date | Product Count |
|---|---|---|
| My First Animal Books | 2023-08-01 | 16 |
| My First Animal Library | 2018-08-01 | 51 |
| My First Pet | 2017-01-01 | 16 |
| My First Pet + Our Pets Pairing | 2021-08-01 | 6 |
| My First Sports | 2011-01-01 | 17 |
| My Government | 2018-08-01 | 7 |
| My Senses | 2023-01-01 | 5 |
| Mysterious Nature | 2024-08-01 | 7 |
| Mythical Creatures | 2020-08-01 | 13 |
| Mythical Creatures | 2024-01-01 | 5 |
| Mythical Creatures Set Two | 2025-01-01 | 9 |
| Mythical Meals | 2021-08-01 | 7 |
| Nasty Ways to Go | 2023-08-01 | 5 |
| Native American Nations | 2023-08-01 | 11 |
| Natural Disasters | 2019-07-01 | 14 |
| Natural Disasters | 2023-08-01 | 6 |
| Nature Heals | 2021-01-01 | 10 |
| Nature's Deadliest | 2013-01-01 | 19 |
| Nature's Superheroes | 2018-01-01 | 7 |
| Nature Walk | 2012-08-01 | 8 |
| Need for Speed | 2022-08-01 | 7 |
| Never Forget: Heroes of 9/11 | 2021-08-01 | 7 |
| NFL Rivalries | 2019-08-01 | 7 |
| NFL's Greatest Players | 2019-08-01 | 6 |