- The ReturnAuthor: H. Beam Piper, John J. (John Joseph) McGuire, Kelly FreasLanguage: English
- The ReturnAuthor: H. Beam Piper, John J. (John Joseph) McGuireLanguage: English
- The Revolt on VenusAuthor: Rockwell, Carey, Willy Ley, Glanzman, Louis [Illustrator]Language: English
- The Revolutions of TimeAuthor: Dunn, JonathanLanguage: English
- The Runaway AsteroidAuthor: Cooper, Michael D.Language: English
- The Runaway SkyscraperAuthor: Murray LeinsterLanguage: English
- The Second DelugeAuthor: Garrett Putman ServissLanguage: English
- The Seed of the Toc-Toc BirdsAuthor: George Henry WeissLanguage: English
- The Servant ProblemAuthor: Robert F. YoungLanguage: English
- The short lifeAuthor: Donovan, Francis, Hubert RogersLanguage: English
- The Sky Is FallingAuthor: Lester Del ReyLanguage: English
- The Sky TrapAuthor: Frank Belknap LongLanguage: English
- The Skylark of SpaceAuthor: E. E. (Edward Elmer) Smith, Lee Hawkins GarbyLanguage: English
- The Sleeper Awakes: A Revised Edition of When the Sleeper WakesAuthor: H. G. (Herbert George) WellsLanguage: English
- The Space PioneersAuthor: Rockwell, Carey, Willy Ley, Glanzman, Louis [Illustrator]Language: English
- The Stars, My BrothersAuthor: Edmond Hamilton, Virgil FinlayLanguage: English
- The Status CivilizationAuthor: Robert SheckleyLanguage: English
- The Stoker and the StarsAuthor: Algis Budrys, H. R. Van DongenLanguage: English
- The Stolen Bacillus and Other IncidentsAuthor: H. G. (Herbert George) WellsLanguage: English
- The Street That Wasn't ThereAuthor: Clifford D. Simak, Carl JacobiLanguage: English
- The StuttererAuthor: Reuben (Reuben Robert) MerlissLanguage: English
- The Sun KingAuthor: Derreaux, GastonLanguage: English
- The Talkative TreeAuthor: H. B. (Horace Bowne) FyfeLanguage: English
- The Time MachineAuthor: H. G. (Herbert George) WellsLanguage: English
- The Time TradersAuthor: Andre NortonLanguage: English
- The TroubadourAuthor: Robert A. W. (Robert Augustine Ward) LowndesLanguage: English
- The Ultimate ExperimentAuthor: DeKy, ThorntonLanguage: English
- The Ultimate WeaponAuthor: Campbell, John W., Jr. (John Wood)Language: English
- The Universe — or NothingAuthor: Meyer MoldevenLanguage: English
- The Unnecessary ManAuthor: Randall Garrett, Martinez [Illustrator]Language: English
- The UntouchableAuthor: Stephen A. Kallis, Douglas [Illustrator]Language: English
- The Vortex BlasterAuthor: E. E. (Edward Elmer) Smith, John R. (John Robert) ForteLanguage: English
- The war of the worldsAuthor: H. G. (Herbert George) WellsLanguage: English
- The warlord of MarsAuthor: Edgar Rice BurroughsLanguage: English
- The Whispering SpheresAuthor: R. R. (Russell Robert) WinterbothamLanguage: English
- The White Feather HexAuthor: Peterson, DonLanguage: English
- The White InvadersAuthor: Ray CummingsLanguage: English
- The Winds of TimeAuthor: James H. Schmitz, Brotman, Adolph E. [Illustrator]Language: English
- The Winged Men of Orcon: A Complete NoveletteAuthor: Sparks, David R.Language: English
- The Wizard of the Sea; Or, A Trip Under the OceanAuthor: Rockwood, RoyLanguage: English
- The World Set FreeAuthor: H. G. (Herbert George) WellsLanguage: English
- The Worlds of IfAuthor: Stanley G. (Stanley Grauman) WeinbaumLanguage: English
- The WorshippersAuthor: Damon Knight, Ed EmshwillerLanguage: English
- The Yillian WayAuthor: Keith LaumerLanguage: English
- This Crowded EarthAuthor: Robert BlochLanguage: English
- This World Is TabooAuthor: Murray LeinsterLanguage: English
- This World Must Die!Author: H. B. (Horace Bowne) FyfeLanguage: English
- Through Space to Mars; Or, the Longest Journey on RecordAuthor: Rockwood, RoyLanguage: English
- Through the Air to the North Pole: Or, The Wonderful Cruise of the Electric MonarchAuthor: Rockwood, RoyLanguage: English
- Thuvia, maid of MarsAuthor: Edgar Rice BurroughsLanguage: English
- Tight SqueezeAuthor: Dean IngLanguage: English
- Time and Time AgainAuthor: H. Beam Piper, Vincent NapoliLanguage: English
- Time CrimeAuthor: H. Beam Piper, Kelly FreasLanguage: English
- Tinker's DamAuthor: Tinker, Joseph, John SchoenherrLanguage: English
- Toy ShopAuthor: Harry Harrison, Brey, Charles [Illustrator]Language: English
- Traders RiskAuthor: Roger D. AycockLanguage: English
- Treachery in Outer SpaceAuthor: Rockwell, Carey, Willy Ley, Glanzman, Louis [Illustrator]Language: English
- TriplanetaryAuthor: E. E. (Edward Elmer) SmithLanguage: English
- Twelve Stories and a DreamAuthor: H. G. (Herbert George) WellsLanguage: English
- Twenty Thousand Leagues under the SeaAuthor: Jules VerneLanguage: English