Space Science (16 titles)
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Space Tech (8 titles)
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Special Ops
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Special Ops II
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Spectacular Animal Towns
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Speed Zone (6 titles)
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Spooky Stories for Grades 3-8 (40 titles⁎)
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N/A
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Sports Championships (6 titles)
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Sports STEM (6 titles)
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Sports Superstars (36 titles⁎)
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Sports Superstars Series (18 titles)
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Start Your Engines! Series (12 titles)
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State Profiles (52 titles)
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States of Mind (8 titles)
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STEM Careers (16 titles)
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STEM in the Summer Olympics (7 titles)
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Stranded!
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Strange History (4 titles)
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Super Bowl Superstars (1 title⁎)
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Superhero Science (10 titles)
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Super Science Feats (8 titles)
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Supersonic Phonics Complete Set (166 titles)
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Super Sports Stories Set (8 titles)
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Survival Stories Series (8 titles)
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