Books about Human-alien encounters -- Fiction (sorted alphabetically)
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Matter of Ethics R. R. Winterbotham
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Matter of Protocol Jack Sharkey
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Matter of Taste Jr. L. J. Stecher
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Meeting at the Summit Ivar Jorgensen
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Meeting of the Minds Robert Sheckley
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Membership Drive Murray F. Yaco
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Menace From Vega Randall Garrett and Robert Silverberg
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Menace of the Mists H. L. Gold
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Men Without a World Joseph Farrell
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Mercurian Frank Belknap Long
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Message From Mars Clifford D. Simak
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Message From Our Sponsor Henry Slesar
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Meteor-Men of Mars Harry Cord and Otis Adelbert Kline
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Mightiest Qorn Keith Laumer
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Milk Run Robert Donald Locke
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Mind Worms Moses Schere
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miniature menace Frank Belknap Long
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Miss Tweedham's Elogarsn Robert Moore Williams
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Monster of the Asteroid Ray Cummings
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Monster That Threatened the Universe R. R. Winterbotham
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Moon Maid Edgar Rice Burroughs
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Moon Maid Edgar Rice Burroughs
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Mo-Sanshon! Bryce Walton
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Mr. Meek Plays Polo Clifford D. Simak
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My Fair Planet Evelyn E. Smith