Mary Pope Osborne

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The Land of the Dead

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Dolphins and Sharks (Magic Tree House Research Guid …

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Kate and the beanstalk

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Magic Tree House Research Guide: Sabertooths and th …

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New York's Bravest - 1

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Return to Ithaca

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The Gray-eyed Goddess

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A Good Night for Ghosts: Magic Tree House #42

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Haunted Waters