van Vogt The Silkie 76502 SF A. E. van Vogt The Silkie 76701 SF Philip K. Dick The Simulacra (1976) 76801 SF Andre Norton The Sioux Spaceman 76802 SF Andre Norton The Sioux Spaceman 76836 SF Walt Richmond and Leigh Richmond Siva! (1979) 76900 WE Dean Owens The Skull Riders / Merle Constiner The Man Who Shot "The Kid" (1969) 76942 SF Harry Harrison Skyfall (1978) 76960 SF Lester del Rey Badge of Infamy / The Sky is Falling (January 1973) 76972 NA Dorothy Eden Sleep in the Woods (1967) 77051 NA Margaret Erskine Sleep No More 77408 SF Rudy Rucker Software 77410 SF Philip K. Dick Solar Lottery (1974) 77411 SF Philip K. Dick Solar Lottery (1975) 77419 SF Gordon R. Dickson Soldier, Ask Not (1982) 77425 NA Betty Deforrest The Shows of Yesterday 77427 SF Brian Herbert (ed.) The Poetry of Frank Herbert: Songs of Muad'dib 77471 NA Anne Maybury Someone Waiting (1961) 77520 NA Wayne Lee Son of a Gunman / Barry Cord Gun Boss of Triangle 77525 SF Jack Vance Son of the Tree / The Houses of Iszm (December 1971) 77551 SF Andre Norton Sorceress of the Witch World (1970) 77553 SF Andre Norton Sorceress of the Witch World (1976) 77554 SF Andre Norton Sorceress of the Witch World (1977) 77555 SF Andre Norton Sorceress of the Witch World (November 1978) 77556 SF Andre Norton Sorceress of the Witch World (May 1983) 77558 SF Andre Norton Sorceress of the Witch World (1986) 77598 NA Kenneth Von Gunden The Sounding Stillness 77620 SF Robert E. Howard The Sowers of the Thunder (1979) 77710 SF Robert Lory The Eyes of Bolsk / Mack Reynolds The Space Barbarians (June 1969) 77730 SF Robert A. Heinlein Space Cadet 77780 SF H. Beam Piper Space Viking 77782 SF Mack Reynolds Space Visitor 77783 SF Mack Reynolds Space Visitor 77785 SF Eric Frank Russell Six Worlds Yonder 6 unrelated stories. / The Space Willies A spoof on Scientology. (July 1971) 77791 SF Fred Saberhagen Specimens 77841 NA S.E. Stevenson Spring Magic 77905 NA Jane Blackmore The Square of Many Colours 77910 WE Dwight Bennett Newton (as Clement Hardin) Stage Line to Rincon / Ray Hogan A Man Called Ryker (1971) 77918 WE James Powell Stage to Seven Springs 77925 WE Stephen Payne Stampede on Farway Pass / Brian Garfield (as Frank Wynne) Lynch Law Canyon (1965) 77953 SF Marion Zimmer Bradley