| Hot Streaks (8 titles) |
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| How America Works (12 titles) |
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| Idioms (8 titles) |
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| Immigrant Experiences (16 titles) |
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| Incredible Sports Records (6 titles) |
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| Influential First Ladies (12 titles) |
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| Influential Women (6 titles) |
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| Inside Big Events (6 titles) |
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| Insider's Guide to Pro Basketball (30 titles) |
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| In the Barnyard (8 titles) |
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| In the Deep Blue Sea (12 titles) |
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| In the Driver's Seat (8 titles) |
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| Into the Wild Outdoors (12 titles) |
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| Investigating Pollution (8 titles) |
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| Jess and Jaylen (8 titles) |
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| Joke Books (8 titles) |
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| Kids' Guides (10 titles) |
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| Language Rules! (12 titles) |
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| Laughing Matters (8 titles) |
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| Learning Library Skills (6 titles) |
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| Legendary Creatures (12 titles) |
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| Let's Explore Ecosystems (12 titles) |
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| Life Cycles (12 titles) |
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| Life in Water Biomes (6 titles) |
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