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Martin Gardner
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Pocket Puzzlers: Brain Teasers
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Puzzles from Other Worlds
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Puzzling questions about the solar system
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Relativity For The Million
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Relativity simply explained
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Riddles of the Sphinx and Other Mathematical Puzzle …
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Sacred Beetle and Other Great Essays in Science
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Science puzzlers
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Science, Good, Bad, and Bogus
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Smart Science Tricks
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