- Ucho, dynia, 125! (Polish edition)
- Ukridge
- Ultime lettere di Jacopo Ortis. Notizia bibliografica
- Ulysse contre le cyclope - Roman mythologie - Dès 7 ans
- Ulysse et le cyclope - Petites histoires de la Mythologie - Dès 9 ans
- Ulysse le voyage aux mille dangers - Dès 7 ans
- Ulysses
- Um Olhar pela Janela
- Uma história embrulhada
- Umbra
- Un bon petit diable
- Un canto di Natale
- Un Canto di Natale - A Christmas Carol (Edizione originale con le splendide illustrazioni di Arthur ...
- Un capitaine de quinze ans
- Un petit monde d'enfants
- Un planeta a la deriva
- Un pui de foca orfan
- Un torrente de aguas turbulentas
- Un yankeu din Connecticut la curtea regelui Arthur
- Una e o Leão
- Una extraña confesión
- Una grieta en el espacio
- Una joven a la antigua
- Una peccatrice
- Uncle Remus and Brer Rabbit
- Uncle Remus: His Songs and His Sayings
- Uncle Rutherford's Nieces: A Story for Girls
- Uncle Sam's Boys as Lieutenants or Serving Old Glory as Line Officers
- Uncle Sam's Boys as Lieutenants or, Serving Old Glory as Line Officers
- Uncle Sam's Boys As Sergeants
- Uncle Sam's Boys as Sergeants or Handling Their First Real Commands
- Uncle Sam's Boys in the Ranks or Two Recruits in the United States Army
- Uncle Sam's Boys In the Ranks or, Two Recruits In the United States Army
- Uncle Sam's Boys With Pershing's Troops or Dick Prescott at Grips With the Boche
- Uncle Tom's Cabin
- Uncle Wiggily's Story Book
- Uncle Wiggly in the Woods
- Under Boy Scout Colors (1917)
- Under Plum Lake
- Under the Liberty Tree: a story of the "Boston Massacre”
- Under the Mendips, a Tale
- Under the Ocean to the South Pole or The Strange Cruise of the Submarine Wonder
- Under the Rebel's Reign
- Under the Summer Sun
- Under the Volcano
- Une chanteuse à Médine et autres contes arabes
- Une histoire pour tuer le temps
- Une Page d'Amour
- Une princesse de Mars (Le conquérant de la planète Mars)
- Une Ville flottante
- Une ville flottante
- Uneasy Money
- Ungdom og kærlighed
- Unsere kleine Farm 8-Book Collection Of Laura Ingalls Wilder
- Up the Baltic or Young America in Norway, Sweden, and Denmark
- Up the Forked River Or, Adventures in South America
- Up the River or Yachting on the Mississippi
- Up the River or, Yachting on the Mississippi
- Ursa
- Ursels Backfischzeit
- Uruk ist niemals tot
- Us and the Battle Man (1920)
- Using Informational Text to Teach The Great Gatsby