Books about Human-alien encounters -- Fiction (sorted alphabetically)
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Cargo to Callisto Jerome Bixby
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Car Pool Rosel George Brown
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Catspaw George O. Smith
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Child of the Sun Leigh Brackett
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Children of the Chronotron S. J. Byrne
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Cinderella Story Allen Kim Lang
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Citadel of the Green Death Robert Emmett McDowell
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Citadel of the Star Lords Edmond Hamilton
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City of the Living Flame Henry Hasse
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Clean Break Roger D. Aycock
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Collector's Item Evelyn E. Smith
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Colossus of Chaos Nelson S. Bond
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colour out of space H. P. Lovecraft
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Combatman John Massie Davis
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Come Into My Brain! Robert Silverberg
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Come into my parlor Charles E. Fritch
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Coming of the Gods Chester Whitehorn
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Common Denominator John D. MacDonald
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Communication Charles L. Fontenay
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Con-Fen James R. Adams
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Conquistadors Come Mary Elizabeth Counselman
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Contact Point Jack Sharkey
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Contamination Crew Alan Edward Nourse
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Corpus earthling Louis Charbonneau
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Cosmic Bluff Mack Reynolds