Uller Uprising
H. Beam Piper
Federation (1)
Uh-Oh City
Jonathan Carroll
The Ugly Little Boy
Isaac Asimov & Robert Silverberg
The Ugly Chickens
Howard Waldrop
Uglies
Scott Westerfeld
Uglies (1)
Gerry Anderson's UFO 2
John Burke
Gerry Anderson's UFO
Ubik
Philip K. Dick
The Tyrant
Eric Flint & David Drake
General / Raj Whitehall (8)
Tyrant's Blood
Fiona McIntosh
Valisar (2)
The Tyranny of the Night
Glen Cook
Instrumentalities of the Night (1)
The Tyranny of Heaven
Stephen Baxter
Xeelee (1)
Tyrannosaurus Rex
Ray Bradbury
A Typical Day
Doris Piserchia
Book of Secrets
Chris Roberson
Spencer Finch (2)
Twofold Desires
Ashleigh Raine
Talisman Bay (2.5)
The Two-Space War
Leo Frankowski & Dave Grossman
Two-Space (1)
Two Worlds, and in Between
Caitlín R. Kiernan