| Spy Guide (6 titles) |
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| Star Athletes (6 titles) |
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| Star Biographies (6 titles) |
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| Stars of Music (6 titles) |
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| State Birds (6 titles) |
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| STEAM Lab Set 1 (6 titles) |
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| STEAM Lab Set 2 (6 titles) |
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| Stellar Space (6 titles) |
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| STEM in Sports (7 titles) |
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| STEM in the Greatest Sports Events (6 titles) |
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| STEM in the Real World (6 titles) |
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| STEM Stories (6 titles) |
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| STEM Superstar Women (6 titles) |
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| Stories of the Civil Rights Movement (8 titles) |
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| Strength in Numbers: Animal Groups (6 titles) |
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| Strong, Healthy Girls (12 titles) |
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| Super-Awesome Science (8 titles) |
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| ¡Súper geología! (Geology Rocks!) (1 title) |
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| ¡Súper geología! Set 2 (Geology Rocks! Set 2) (6 titles) |
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| Superhero Animals (6 titles) |
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