Ubik
Philip K. Dick
Gerry Anderson's UFO 2
John Burke
Uller Uprising
H. Beam Piper
Federation (1)
Ullr Uprising
The Ultimate Bike Path
Mike Sirota
Bicycling Through Space and Time (2)
The Ultimate Catalyst
John Taine
The Ultimate Hitchhiker's Guide to the Galaxy
Douglas Adams
Hitchhiker's Guide to the Galaxy (99)
The Ultimate Wave
Terry Denton
Storymaze (1)
Against All Enemies
Alexander C. Irvine
The Ultimates (1)
Unborn Tomorrow
Mack Reynolds
Uncertainty
John W. Campbell, Jr.
Unchained
C. J. Barry
The Unconquerable
Bill Fawcett
Bolos (2)
The Unconquered Country: A Life History
Geoff Ryman
Under Arctic Ice
Harry Bates & Rand Miller
Under Fire
Kenneth von Gunden
K-9 Corps (2)
Under Pressure
Frank Herbert
Under the Dome
Stephen King
Under Twin Suns
Andrew J. Offutt
Spaceways (8)
Underground
Andrew McGahan