U
- Ubik by Philip K. Dick
- Uhura's Song by Janet Kagan
- Under the Green Star by Lin Carter
- The Universe Maker by A. E. van Vogt
- Hans Phaall: A Tale (also known as The Unparalleled Adventure of One Hans Pfaall) by Edgar Allan Poe
- Unveiling a Parallel by Alice Ilgenfritz Jones & Ella Merchant
- Uglies series by Scott Westerfeld
- namely, Uglies, Pretties, Specials and Extras
Read more about this topic: List Of Science Fiction Novels