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Podkayne of Mars
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The Star Beast
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The Cat Who Walks Through Walls
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Grumbles From the Grave
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Time for the Stars
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The Number of the Beast
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Variable Star
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I Will Fear No Evil
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Robert Heinlein's Expanded Universe 2
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Assignment in Eternity
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Tunnel in the Sky
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The Pursuit of the Pankera: A Parallel Novel About Parallel Universes
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Citizen of the Galaxy
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The Unpleasant Profession of Jonathan Hoag
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Sixth Column