Books about Extraterrestrial beings -- Fiction (sorted alphabetically)
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D-99: a science-fiction novel H. B. Fyfe
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Doorstep Keith Laumer
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Double Take Wilson Parks Griffith
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Earthman Irving E. Cox
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End as a Hero Keith Laumer
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Ethicators Willard Marsh
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Exploiter's End James Causey
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Export Commodity Irving E. Cox
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Extracts from the Galactick Almanack: Music Around the Universe Laurence M. Janifer
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Feet of Clay Robert Hoskins
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Fifteen Hundred Miles an Hour Charles Dixon
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Final Glory Henry Hasse
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Founding Father Jesse F. Bone
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Gift Bearer Charles L. Fontenay
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green girl Jack Williamson
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Green Grew the Lasses Ruth Laura Wainwright
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Green World Hal Clement
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Growing up on Big Muddy Charles V. De Vet
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guest rites Robert Silverberg
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Half past Alligator Donald Colvin
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Hold Onto Your Body! Richard O. Lewis
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If You Was a Moklin Murray Leinster
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Indirection Everett B. Cole
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Invader Alfred Coppel
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Islands of Space Jr. John W. Campbell