| Guidebooks to the Unexplained (6 titles) |
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| Haunted Places (6 titles) |
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| High-Stakes Heists (6 titles) |
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| High Technology (6 titles) |
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| Historical Disasters (6 titles) |
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| History of Games (6 titles) |
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| History of Sports (6 titles) |
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| History of the Titanic (6 titles) |
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| Hollywood Monsters Set 1 (6 titles) |
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| Hollywood Monsters Set 2 (6 titles) |
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| How to Survive (6 titles) |
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| Hype Brands (6 titles) |
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| Iconic Cars (6 titles) |
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| Long Vowels (6 titles) |
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| Miracles in Sports (6 titles) |
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| Motorcycles (6 titles) |
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| Motor Mayhem (6 titles) |
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| Musical Notes (6 titles) |
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| NASCAR Biographies (6 titles) |
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| Native American Leaders (6 titles) |
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