Mary Pope Osborne

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Polar Bears and the Arctic

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Polar Bears Past Bedtime

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Pirates (Magic Tree House Research Guide, paper)

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Penguins and Antarctica Magic Tree House Research G …

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Pandora's Box (Hello Readers)

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One world, many religions : the ways we worship

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Nonna's Book of Mysteries (Alchemy)

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Night of the Ninjas (The Magic tree house # 5)

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Night of the New Magicians

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New York's Bravest - 1