The Uplift War
David Brin
Uplift (3)
Upland Outlaws
Dave Duncan
A Handful of Men (2)
Up to the Sky in Ships
A. Bertram Chandler
Up the Walls of the World
James Tiptree, Jr.
Up the Line
Robert Silverberg
Up in a Heaval
Piers Anthony
Xanth (26)
Up Around the Bend
Paul Di Filippo
Up and Down
Algernon Blackwood
The Unwritten Girl
James Bow
The Unwritten Books (1)
Unwise Child
Randall Garrett
Unwirer
Cory Doctorow & Charles Stross
Unwind
Neal Shusterman
Unwind Dystology (1)
The Unwilling Warlord
Lawrence Watt-Evans
Legends of Ethshar (3)
Unwelcomed Visitor
William Morrison