- Twenty Thousand Leagues Under the Seas: An Underwater Tour of the WorldAuthor: Jules Verne, Frederick Paul Walter, Milo WinterLanguage: English
- Uller UprisingAuthor: H. Beam Piper, John F. Carr, John D. (John Drury) ClarkLanguage: English
- Ullr UprisingAuthor: H. Beam PiperLanguage: English
- Unborn TomorrowAuthor: Mack Reynolds, Kelly FreasLanguage: English
- Under the Ocean to the South Pole; Or, the Strange Cruise of the Submarine WonderAuthor: Rockwood, RoyLanguage: English
- UnspecialistAuthor: Yaco, Murray F., Kelly FreasLanguage: English
- Untechnological EmploymentAuthor: Ed M. ClintonLanguage: English
- Unwise ChildAuthor: Randall GarrettLanguage: English
- Valley of DreamsAuthor: Stanley G. (Stanley Grauman) WeinbaumLanguage: English
- Valley of the CroenAuthor: Tarbell, LeeLanguage: English
- Vanishing PointAuthor: C. C. (Charles Clarence) Beck, Martinez [Illustrator]Language: English
- VictoryAuthor: Lester Del ReyLanguage: English
- ViewpointAuthor: Randall GarrettLanguage: English
- VigorishAuthor: John Berryman, Petrizzo [Illustrator]Language: English
- Vingt mille Lieues Sous Les Mers — CompleteAuthor: Jules VerneLanguage: French
- Vingt Mille Lieues Sous Les Mers — Part 1Author: Jules VerneLanguage: French
- Vingt Mille Lieues Sous Les Mers — Part 2Author: Jules VerneLanguage: French
- Voodoo PlanetAuthor: Andre NortonLanguage: English
- Voyage au Centre de la TerreAuthor: Jules VerneLanguage: French
- Wandl the InvaderAuthor: Ray CummingsLanguage: English
- Warlord of KorAuthor: Terry CarrLanguage: English
- Warning from the StarsAuthor: Cocking, Ron, Leo SummersLanguage: English
- Watch the SkyAuthor: James H. SchmitzLanguage: English
- We Didn't Do Anything Wrong, HardlyAuthor: Kuykendall, Roger, Kelly FreasLanguage: English
- What The Left Hand Was DoingAuthor: Randall Garrett, Kelly FreasLanguage: English
- When the Sleeper WakesAuthor: H. G. (Herbert George) WellsLanguage: English
- WindAuthor: Charles L. FontenayLanguage: English
- With No Strings AttachedAuthor: Randall Garrett, George SchellingLanguage: English
- WizardAuthor: Laurence M. Janifer, John SchoenherrLanguage: English
- Zarlah the MartianAuthor: R. Norman (Robert Norman) GrisewoodLanguage: English
- Ĉe la koro de la teroAuthor: Edgar Rice Burroughs, Mickle, Gary [Translator]Language: Esperanto
- —And Devious the Line of DutyAuthor: Tom Godwin, George SchellingLanguage: English