Books about Human-alien encounters -- Fiction (sorted alphabetically)
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Task Mission Fox B. Holden
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Task of Kayin Joseph Samachson
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Terror Out of Space Dwight V. Swain
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Terror Out of Space Leigh Brackett
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Test Colony Winston K. Marks
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The Vilbar Party Evelyn E. Smith
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Thing in the Truck Stephen Marlowe
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Thing of Venus Wilbur S. Peacock
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Third Little Green Man Damon Knight
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This World is Ours! Emil Petaja
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thought-feeders R. R. Winterbotham
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Thought-Men of Mercury R. R. Winterbotham
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Threlkeld's Daughter James Bell
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Thunder in the void Henry Kuttner
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Ticket to the Stars Raymond E. Banks
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Tiger by the Tail Poul Anderson
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Time of Cold Mary Carlson
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Time-Techs of Kra Max C. Sheridan
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time to die Harold Calin
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Today is Forever Roger D. Aycock
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To Save Earth Edward W. Ludwig
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To the sons of tomorrow Irving E. Cox
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Tourists to Terra Mack Reynolds
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Toy Kris Neville
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Traitor's Choice Paul W. Fairman