- Echo of the Dead
- Insurrection Day
- Marple: Twelve New Mysteries
- House of Silence
- Black Dog
- Unto Caesar
- Unto You
- Untold
- Untold Rage
- Untold Truths
- Untouchable Desire
- Untouchable Heart
- Untouched: A Murder Mystery and Erotic Love Story
- Untraceable
- Untreu
- Untruthful Speech
- Unturned Stones
- Unusual People
- Unusual school
- Unusual Suspect
- Unusual Suspects
- Unveiled
- Unveiled Truth
- Unveiled: Laid Bare #2
- Unveiling the Past
- Unverfälscht (Ein Cozy-Krimi mit Ruby Steele – Buch 4)
- Unvergleichliche Lilie. Agentur Amur
- Unverschlüsselt
- Unwanted
- Unwanted (Horror Short Story)
- Unwanted Business: A Zora Cooper Mystery Novella
- Unwanted Discovery
- Unwanted House Guest
- Unwanted Proof
- Unwanted Sacrifices
- Unwanted: Dead or Alive
- Unwarranted Abduction
- UNWEAVING A TANGLED WEB
- Unwelcome Mail
- Unwiederbringlich
- Unwilling
- Unwilling Accomplice
- Unwilling to Break
- Unwitting
- Unwitting Accomplice
- Unwriting The Chisel'd Script
- Unwritten Crimes
- Unwritten Life & Death
- Unyielding Future
- Unzipped
- Un’esca per Zero (Uno spy thriller della serie Agente Zero—Libro #8)
- Un’estate da ragazzi
- Un’ombra in mare
- Un’ombra più bianca del pallido
- Uomini in gabbia
- Uomo e donna
- Uomovivo
- Uova Fatali
- Up a Winding Stair
- Up Above The Woodpile
- Up Against It
- Up Close and Dangerous
- Up Country
- Up Her
- Up in Honey's Room
- Up in Irish Brooklyn
- Up In Smoke
- Up In Smoke Spirit of the Soul Wine Shop Mystery Part 3
- Up In Smoke: Five Supernatural Stories
- Up In the Air: An Eamon Cowan Story
- Up Like Thunder
- UP NORTH
- Up North
- Up On Crowleys Ridge
- Up Roystonhill
- Up Shute Creek
- Up Roystonhill
- Up Shute Creek
- Up the Crazy
- Up the Creek
- Up The Ladder Of Gold
- Up the Ladder of Gold
- Up The Lazy River
- Up to No Good
- Up to No Gouda
- Uparty milicjant
- Upcountry
- Update to kill
- Upholding Law and Disorder: Police Tales From The Front Line
- Upholding the Paw
- Upiory
- Upiory XX wieku
- Upiór południa
- Upiór w pasiece
- Upload to Murder
- Upload: A Very American Conspiracy
- Upon a Dark Night
- Upon a Midnight Clear: A Nosy Nuns Mystery (Volume 3)
- Upon a Midnight, Clear
- Upon a Nation's Honour
- Upon Awakening
- Upon My Soul
- Upon the Midnight Clear
- Upon the Willful Ignorance of Men
- Upon This Rock
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