- Ultraxenopia
- Ulvehundgåten
- Ulysses
- Um estudo em Charlotte
- Uma manhã na África
- Uma tarde na Amazônia
- Un detective molto speciale
- Un Estudio en Escarlata
- Un fragmento de noche en un frasco
- Un homme dans la nuit
- Un ingannevole dubbio
- Un mundo nuevo
- Un museo siniestro
- Un village étrange
- Un voleur au camping
- Un, Deux, Trois...Sept !
- Una Invitación Para Matar
- Una noche terrible
- Una voz en la casa prohibida
- Unaccompanied Minor
- Unbelievable
- Unbound: Stories of Transformation, Love, and Monsters
- Unbreakable
- Uncivil Acts
- UNCLE ABNER, MASTER OF MYSTERIES (18 Detective Tales in One Volume)
- Uncle Abner, Master of Mysteries: 18 Detective Tales in One Volume
- Uncontrollable
- Uncover
- Uncover - Die Trollfabrik
- Uncovered
- Under Copp's Hill
- Under His Spell
- Under Locker and Key
- Under Suspicion: A Friday Barnes Mystery
- Under the Egg
- Under the Shadow's Eye
- Undercurrent
- Undervannsgåten
- Undone
- Une petite histoire sinistre
- Unearthly Things
- Unfinihed Business
- Unfolding
- Unforgettable
- Unforsaken
- Ung man med kamera
- Uninvited
- United As One
- Unleashed
- Unlock Holmes: Space Detective
- Unlovely
- Unpredictable Romance
- Unquiet Dead
- Unraveled
- Unraveling
- Unrivaled
- Unseen Secrets
- Unseen Worlds
- Unser Freund Strolch
- Unsettled Things
- Unspoken
- Unstoppable Moses
- Unsung Requiem
- Family of Liars
- Untouchable
- Untraceable
- Unwanted Agenda
- Unwanted Discovery
- Unwanted Family
- Unwanted House Guest
- Unwanted Sister
- Up All Night
- Update on Crime
- Upheaval
- Upiorny dom
- Uppdrag från kriminalen
- Urban Legends
- Urban Legends (An Eve Hathaway's Paranormal Mystery Collection Part 1)
- Urban Legends: An Eve Hathaway's Paranormal Mystery Collection Part 2
- Urban Legends: An Eve Hathaway's Paranormal Mystery Collection Part 4
- Uroczysko
- Ursos polares depois da hora de dormir
- Ursula jagt eine Diebin
- Ursula schwebt vorüber
- Ursula schwebt vorüber (Kriminalroman)
- Us
- Ushers, Inc.