Savage Pellucidar 75134 SF Edgar Rice Burroughs Savage Pellucidar 75136 SF Edgar Rice Burroughs Savage Pellucidar 75150 WE Ray Hogan Track the Man Down / Lee. E. Wells Savage Range (1965) 75181 NA Jean Vicary Saverstall 75441 SF Sam J. Lundwall Science Fiction: What It's All About (1977) 75520 WE Tom West Scorpion Showdown / Clay Ringold Reckoning in Fire Valley (1969) 75617 NA Ray Hogan Showdown on Texas Flat 75690 SF George Bamber The Sea Is Boiling Hot 75695 SF Andre Norton Sea Siege 75696 SF Andre Norton Sea Siege 75750 NA Sax Rohmer The Secret of Holm Peel and Other Strange Stories (1970) 75781 SF Leigh Brackett The Secret of Sinharat / Leigh Brackett People of the Talisman (November 1971) 75800 SF George Bamber The Sea Is Boiling Hot (1971) 75830 SF Andre Norton Secret of the Lost Race 75831 SF Andre Norton Secret of the Lost Race 75832 SF Andre Norton Secret of the Lost Race 75833 SF Andre Norton Secret of the Lost Race (1978) 75834 SF Andre Norton Secret of the Lost Race (1981) 75835 SF Andre Norton Secret of the Lost Race 75836 SF Andre Norton Secret of the Lost Race 75860 SF Mack Reynolds Section G: United Planets 75875 SF Robert Silverberg The Seeds of Earth 75894 SF Eric Frank Russell Sentinels from Space 75940 SF Marion Zimmer Bradley Seven from the Stars 75945 NA Ron Goulart The Same Lie Twice (1973) 75958 NA Brad Steiger Sex and Satanism (1969) 75968 WE Nelson Nye Bancroft's Banco / The Seven Six-Gunners (1963) 75980 NA Barbara Levins Sexual Power of Marijuana 75987 NA Ruth Abbey The Shadow Between (1974) 76015 WE Robert Mccaig The Shadow Maker (1970) 76096 SF Jeff Sutton Alton's Unguessable / Kenneth Bulmer The Ships of Durostorum (June 1970) 76098 SF Bob Shaw Ship of Strangers 76099 SF Robert E. Howard The She Devil (1983) 76181 NA Louis L'Amour (as Jim Mayo) Showdown at Yellow Butte 76219 SF Robert Silverberg and Randall Garrett (jointly as Robert Randall) The Shrouded Planet (1982) 76343 SF Charles Sheffield Sight of Proteus 76380 SF William F. Temple Battle on Venus / William F. Temple The Three Suns of Amara (June 1973) 76385 SF D. G. Compton The Silent Multitude 76390 SF Robert Silverberg The Silent Invaders 76391 SF Robert Silverberg The Silent Invaders (1977) 76500 SF A. E. van Vogt The Silkie 76501 SF A. E.