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Satan's World by Poul Anderson 1977 Berkley Medallion Paperback
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Scavenger Hunt by Stephen Goldin 1976 Laser Paperback #25
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Seas of Ernathe by Jeffrey Carver 1976 Laser Paperback #34
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Second Foundation by Isaac Asimov 1964 Avon N306 Paperback
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Second Stage Lensman E.E. Doc Smith 1997 Old Earth Books Paperback
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Secret Agent of Terra/The Rim of Space by Brunner/Chandler 1962 Ace Double F-133
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Seetee Shock by Jack Williamson 1968 Lancer Paperback
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Seetee Shock by Jack Williamson 1968 Lancer Paperback First Edition
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Sentinels of Space by Eric Frank Russell 1960 Ace D-468 Paperback
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Seraphim by Michele Hauf 2006 Luna Paperback
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Serpent's Reach by C.J. Cherryh 1980 Nelson Doubleday Hardcover BCE
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Serving in Time by Gordon Eklund 1975 Laser Paperback #6
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Seven From the Stars/Worlds of the Imperium by Bradley/Laumer Ace Double F-127
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Seven From the Stars/Worlds of the Imperium by Bradley/Laumer Ace Double F-127
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Shadow Puppets by Orson Scott Card 2003 Tor Paperback
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Shadow Puppets by Orson Scott Card 2003 Tor Paperback
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Shards of Space by Robert Sheckley 1962 Bantam J2443 Paperback
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Shipstar by Gregory Benford & Larry Niven 2015 Tor Paperback
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Shiva Descending by Gregory Benford and William Rotsler 1985 Tor Paperback
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Shiva Descending by Gregory Benford and William Rotsler 1985 Tor Paperback
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Shiva in Steel by Fred Saberhagen 1998 Tor Hardcover
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Silverlock by John Myer Myers 1966 Ace A-8 Paperback
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Sister Time by John Ringo & Julie Cochrane 2007 Baen Hardcover
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Sister Time by John Ringo & Julie Cochrane 2007 Baen Paperback
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