- Unjust Revenge
- Unjustifiable Means
- Unjustified
- Unjustified Favor
- Unkalkulierbar. Mike Winter Kriminalserie, Band 5. Spannender Kriminalroman über Verbrechen, Mord, I...
- UNKELBACH
- Unkept Promises
- Unkillable: A Nick Lawrence Short Story
- Unknowable
- Unknown 9: Genesis: Book One of the Genesis Trilogy
- Unknown 9: Genesis: Tome 1 de la Trilogie Genesis
- Unknown 9: Revelation
- Unknown Alliance
- Unknown Assailant
- Unknown Cause Ep. 1
- Unknown Destination
- Unknown Diners
- Unknown Enemy: A Green Dory Inn Mystery
- Unknown Event (School Marshal Novel Book 3)
- Unknown for a Reason
- Unknown Male
- Unknown Man Number 89
- Unknown Object
- Unknown Operative: A Carrie Chronicles Spy Thriller
- Unknown Sort out
- Unknown Taste
- Unknown Threat (School Marshal Novels Book 1)
- Unknown Truth
- Unknown Vengeance
- Unlawful Alliances: Book #1 in the Jenny McNair Mystery Series
- Unlawful Contact: I-Team 3 (A series of sexy, thrilling, unputdownable adventure)
- Unlawful Harvest
- Unlawful Protection
- Unlawful Revenge
- Unleashed
- Unleashed - Ungezügelt
- Unleashed Vengeance
- Unleashed: Case of the Bull Doggish
- Unleashed: Case of the Great Danish
- Unleashed: Case of the Irish Sitter
- Unleashed: Case of the Pom Poms
- Unleashed: Case of the Yorkshire Pudding
- Unleashed: Tail One
- Unlikely Alliance
- Unlikely Allies
- Unlikely Traitors
- Unloaded
- Unloaded Volume 2
- Unloaded: Crime Writers Writing Without Guns
- Unlock These Hands
- Unlocked
- Unlocked Secrets: Book 1
- Unlocked Stories
- Unlocking Her Chances
- Unlocking Her Doubts
- Unlocking Her Dreams
- Unlocking Her Grace
- Unlocking Her Heart
- Unlocking Her History
- Unlocking Her Secrets
- Unloved: Journey Through Hell
- Unlucky Bumpkin
- Unlucky for Some: A Lloyd & Hill Novel 13
- Unlucky Roger
- Unlucky Society XIII: The Unlucky Heroes
- Unlösbar
- Unmasking the Shadow Man
- Unmenschen
- Unnamed
- Unnamed: A One-Act Play
- Unnatural Acts
- Unnatural Causes
- Unnatural Fire
- Unnatural Justice (Oz Blackstone series, Book 7)
- Unnatural Murder: Poison In The Court Of James I
- Unnatural Order
- Unnatural Selection
- Unnatural Selection Collection
- Unnecessary Death
- Unnecessary Men/Book One Of/Doubtful Intelligence
- Unneutral Murder
- Uno di noi
- Uno nessuno centomila
- Uno scheletro in ufficio
- Uno sconosciuto nel mio letto
- Uno sguardo nel misterro
- Uno spritz per il commissario Mezzasalma
- Uno squarcio tra le mura
- Uno strano caso
- Uno strano caso per il Professor Poltron
- Uno studio a sei zampe
- Uno studio in Hudson
- Uno studio in versi
- Uno studio in... male
- Uno studio inutile
- Unofficial and Deniable
- Unordinary Love
- Unorthodox
- Unpacking the Undertaker
- Unparalleled Affairs
- Unpardonable Sin
- Unpardonable Sins
- Unplanned
- Unplanned Party
- Unplugged