| World of Mythical Beings Set 2 (6 titles) |
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| World Religions (6 titles) |
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| World Safaris (6 titles) |
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| World's Greatest Soccer Players (8 titles) |
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| World's Weirdest Animals (4 titles) |
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| World War I (6 titles) |
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| World War II (6 titles) |
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| World Wonders (6 titles) |
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| Wrestling Biographies Set 1 (6 titles) |
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| Xtreme Aircraft (6 titles) |
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| Xtreme Armed Forces (6 titles) |
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| Xtreme Cars (6 titles) |
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| Xtreme Dinosaurs (6 titles) |
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| Xtreme Fish (1 title) |
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| Xtreme Horror Lab (6 titles) |
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| Xtreme Insects (6 titles) |
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| Xtreme Military Aircraft Set 1 (5 titles) |
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| Xtreme Military Aircraft Set 2 (6 titles) |
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| Xtreme Moments in Sports (6 titles) |
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| Xtreme Predators (3 titles) |
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