Series starting with U
- Uphill Walkers: Portrait of a Family
- Uplift Storm Trilogy
- Uplink Squadron
- Upon a Broken Throne
- Upon a Marigold
- Upon the Head of the Goat
- Upper Kingdom
- Upside-Down Magic
- Upstairs Downstairs
- Up the Garden Path
- Uptown Girls
- Urban Farm Fresh Romance
- Urban Outlaws
- Urban Shaman
- Urban Temples of Cthulhu
- Urban Underground
- Ur-Bar
- Urmel
- Ursus Brothers
- U.S. Agent (1993)
- Usagi Yojimbo (2019)
- Usagi Yojimbo Saga
- Usagi Yojimbo [兎用心棒]
- Usborne Beginners
- Usborne Classics Retold
- Usborne Computer Guides
- Usborne Discovery
- Usborne Encyclopedias
- Usborne Farmyard Tales
- Usborne First Picture Board Books
- Usborne First Reading Level 1
- Usborne First Thousand Words
- Usborne Great Searches
- Usborne Guides
- Usborne Language for Beginners
- Usborne Library of Science
- Usborne Little Board Books
- Usborne Music Books
- Usborne Parents' Guides
- Usborne Puzzle Adventures
- Usborne Science Activities
- Usborne Sticker Puzzles
- Usborne Time Traveller
- Usborne Young Puzzles
- Us Dark Few Series
- User Friendly
- U.S. Landmark Books
- US Renovation Trends
- U.S. State Curiosities
- Utterly Confused Series
- Utterly Dark
- Uyumsuz Defne Kaman'ın Maceraları
- Uzaki-chan Wants to Hang Out!
- Uzumaki
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