| The Scoop on Superstitions (12 titles) |
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| The Smart Kid's Guide to Everyday Life (8 titles) |
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| The World's Greatest Artists (8 titles) |
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| The World's Greatest Athletes (19 titles) |
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| Today's MVPs and Champions (8 titles) |
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| Top 10 in Sports (12 titles) |
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| Traditions around the World (8 titles) |
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| True Animal Stories (6 titles) |
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| Twelve Magic Months (12 titles) |
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| Understanding Idioms (12 titles) |
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| Understanding the Basics (8 titles) |
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| Understanding the Basics (6 titles) |
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| United States Landmarks (8 titles) |
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| Unsolved Mysteries (8 titles) |
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| U.S.A. Travel Guides (52 titles) |
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| Values to Live By (12 titles) |
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| Vowel Blends (12 titles) |
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| Wars In U.S. History (8 titles) |
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| Weird-But-True Facts (12 titles) |
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| Weird Sports (6 titles) |
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| Welcoming the Seasons (26 titles) |
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| Welcoming the Seasons (32 titles) |
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| Welcoming the Seasons: Welcome, Fall! (4 titles) |
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| Welcoming the Seasons: Welcome, Spring! (6 titles) |
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