Ringworld (Ringworld, #1)
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The Ringworld Engineers (Ringworld, #2)
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Footfall
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Lucifer's Hammer
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The Mote in God's Eye (Moties, #1)
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The Magic Goes Away
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The Man-Kzin Wars (Man-Kzin Wars Series Book 1)
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World of Ptavvs (Known Space)
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