A Warning from the Future
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Disgusting Diseases
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Asteroids and Comets
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The Night of the Zombies
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Biomes
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Earth
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A Planet in Peril (4 titles)
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Animals
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Black Holes
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Photosynthesis
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The Drafting of the Constitution
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The Lewis and Clark Expedition
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U.S. History: Need to Know (6 titles)
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The Great Depression
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Totally Not True! (4 titles)
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Cells
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Woeful Wars
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Reproduction
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Out of the Bunker
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The Civil War
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Biology Basics: Need to Know (6 titles)
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Cruel Crimes
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The Attack of the Aliens
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Space
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