Books about Human-alien encounters -- Fiction (sorted alphabetically)
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Ultimate Eve H. Sanford Effron
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Ultimatum Roger D. Aycock
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Under the Skin Leslie Perri
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Uniform of a Man Dave Dryfoos
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universe wreckers Edmond Hamilton
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Unprotected Species Melvin Sturgis
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untouchable adolescents Harlan Ellison
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Unwelcomed Visitor Joseph Samachson
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Unwilling Professor Arthur Porges
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Useless Bugbreeders James Stamers
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Vandals of the Void Robert Wilson
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vanguard of Venus Landell Bartlett
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Vanisher Michael Shaara
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Vanishing Venusians Leigh Brackett
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Vegans Were Curious Winston K. Marks
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Venus Enslaved Manly Wade Wellman
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Venus Evil Chester S. Geier
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Venus Trap Evelyn E. Smith
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Very Secret Agent Mari Wolf
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Vibration Wasps Frank Belknap Long
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Victory of Klon Wilbur S. Peacock
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Vocation George O. Smith
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voice of the void Jr. John W. Campbell
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War-Gods of the Void Henry Kuttner
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Watchers Roger D. Aycock