Books about Life on other planets -- Fiction (sorted by popularity)
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The Planet Savers Marion Zimmer Bradley 150 downloads
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The untouchable adolescents Harlan Ellison 144 downloads
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Med Ship Man Murray Leinster 138 downloads
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Eight Keys to Eden Mark Clifton 137 downloads
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An Earthman on Venus (Originally titled "The Radio Man") Ralph Milne Farley 136 downloads
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The Gods of Mars Edgar Rice Burroughs 132 downloads
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Star Ship Poul Anderson 131 downloads
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Slave Planet Laurence M. Janifer 130 downloads
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The Masked World Jack Williamson 128 downloads
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Tiger by the Tail Poul Anderson 119 downloads
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The Virgin of Valkarion Poul Anderson 107 downloads
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Woman's touch Evelyn E. Smith 103 downloads
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This World Is Taboo Murray Leinster 101 downloads
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Bleekman's Planet Randall Garrett and Robert Silverberg 100 downloads
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Temptress of Planet Delight Betsy Curtis 98 downloads
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Gambler's World Keith Laumer 96 downloads
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Pariah Planet Murray Leinster 96 downloads
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Cultural Exchange Keith Laumer 94 downloads
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Amour, Amour, Dear Planet! Mark Clutter 93 downloads
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A Matter of Protocol Jack Sharkey 92 downloads
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World of the Mad Poul Anderson 90 downloads
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Citadel of Lost Ships Leigh Brackett 89 downloads
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Operation Interstellar George O. Smith 89 downloads
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The Desert and the Stars Keith Laumer 87 downloads
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No-Risk Planet Stephen Marlowe 86 downloads