The Scariest Places on Earth (12 titles)
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The Secret Lives of Insects (4 titles)
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N/A
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The Seven Wonders of the Modern World (7 titles)
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The Unexplained (4 titles)
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New! Spring 2025 |
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The Unexplained (12 titles⁎)
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The World of Dinosaurs (22 titles)
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The World of Physics (4 titles)
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New! Spring 2025 |
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The World's Fastest (4 titles⁎)
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They Don't Belong: Tracking Invasive Species
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Titanica (4 titles⁎)
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Top Secret Spy Stories (6 titles)
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New! Fall 2024 |
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Totally Disgusting (6 titles)
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Tough Trucks (6 titles)
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True Survival Stories (6 titles)
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Twice the Scare Combos!
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Twice the Scare II Combos! (8 titles)
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Ultimate Speed (1 title⁎)
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Uncommon Animals
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Unexplained Mysteries (13 titles)
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Upsets & Comebacks (1 title⁎)
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U.S. Government: Need to Know (6 titles)
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U.S. History: Need to Know (6 titles)
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U.S. Military (12 titles⁎)
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U.S. National Parks (12 titles)
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