Ringworld

The Mote in God's Eye

Larry Niven

1974

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Rendezvous with Rama

Arthur C. Clarke

1973

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Eon

Greg Bear

1984

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The Ringworld Engineers

Larry Niven

1979

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The Moon is a Harsh Mistress

Robert A. Heinlein

1966

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Gateway

Frederik Pohl

1977

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