Nightfall

The Caves of Steel

Isaac Asimov

1954

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The Garden of Rama (Rama, #3)

Arthur C. Clarke

1991

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The Gods Themselves

Isaac Asimov

1972

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Rama II

Arthur C. Clarke

1989

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Have Space Suit—Will Travel

Robert A. Heinlein

1958

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Nemesis

Isaac Asimov

1989

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