| United States Presidents (2021) (46 titles) |
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| Unusual Animals (6 titles) |
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| U.S. Armed Forces (6 titles) |
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| US Armed Forces (6 titles) |
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| US Landmarks (5 titles) |
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| US Military Careers (6 titles) |
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| US Military Encyclopedias (4 titles) |
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| US Military Equipment and Vehicles (6 titles) |
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| US Symbols (6 titles) |
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| US Symbols (6 titles) |
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| Vehículos y aeronaves militares (Military Aircraft & Vehicles) (5 titles) |
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| Veo, veo un animal (I'm Thinking of an Animal) (6 titles) |
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| Versus (6 titles) |
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| Versus (5 titles) |
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| Video Game Companies (6 titles) |
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| Video Game Encyclopedias (4 titles) |
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| Video Game Heroes Set 1 (6 titles) |
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| Video Game Heroes Set 2 (6 titles) |
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| Volcano Science (6 titles) |
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| Vowel Teams (6 titles) |
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