- Un amour vraiAuthor: Laure ConanLanguage: French
- Un antiguo rencorAuthor: Georges OhnetLanguage: Spanish
- Un billet de loterie: (Le numéro 9672)Author: Jules VerneLanguage: French
- Un bon petit diableAuthor: Ségur, Sophie, comtesse deLanguage: French
- Un dilemmeAuthor: J.-K. (Joris-Karl) HuysmansLanguage: French
- Un drame au LabradorAuthor: Vinceslas-Eugène DickLanguage: French
- Un faccioso más y algunos frailes menosAuthor: Benito Pérez GaldósLanguage: Spanish
- Un viaje de noviosAuthor: Pardo Bazán, Emilia, condesa deLanguage: Spanish
- Una notte fatale: ovvero il racconto dell'esiliato / bozzetti milanesiAuthor: Porati, R. A.Language: Italian
- Una of the hill country: 1911Author: Charles Egbert CraddockLanguage: English
- Uncle Bernac: A Memory of the EmpireAuthor: Arthur Conan DoyleLanguage: English
- Uncle MaxAuthor: Rosa Nouchette CareyLanguage: English
- Uncle Noah's Christmas InspirationAuthor: Leona DalrympleLanguage: English
- Uncle Rutherford's Nieces: A Story for GirlsAuthor: Joanna H. (Joanna Hooe) MathewsLanguage: English
- Uncle Sam's Boys in the Philippines; or, Following the Flag against the MorosAuthor: H. Irving (Harrie Irving) HancockLanguage: English
- Uncle Sam's Boys with Pershing's Troops: Or, Dick Prescott at Grips with the BocheAuthor: H. Irving (Harrie Irving) HancockLanguage: English
- Uncle Silas: A Tale of Bartram-HaughAuthor: Joseph Sheridan Le FanuLanguage: English
- Uncle Titus and His Visit to the CountryAuthor: Johanna Spyri, Louise BrooksLanguage: English
- Uncle Tom's CabinAuthor: Harriet Beecher StoweLanguage: English
- Uncle Wiggily and Old Mother Hubbard: Adventures of the Rabbit Gentleman with the Mother Goose CharactersAuthor: Howard Roger Garis, Bloomfield, Edward [Illustrator], Lang CampbellLanguage: English
- Uncle William: The Man Who Was Shif'lessAuthor: Jennette LeeLanguage: English
- Unconscious ComediansAuthor: Honoré de Balzac, Katharine Prescott WormeleyLanguage: English
- Und die ihr alle meine Brüder seidAuthor: Ida FrohnmeyerLanguage: German
- Under FireAuthor: Charles KingLanguage: English
- Under Fire: The Story of a SquadAuthor: Henri Barbusse, W. Fitzwater WrayLanguage: English
- Under Handicap: A NovelAuthor: Jackson GregoryLanguage: English
- Under King ConstantineAuthor: Katrina TraskLanguage: English
- Under Sealed OrdersAuthor: H. A. (Hiram Alfred) CodyLanguage: English
- Under the AndesAuthor: Rex StoutLanguage: English
- Under the Chilian Flag: A Tale of War between Chili and PeruAuthor: Harry Collingwood, W. (William) RaineyLanguage: English
- Under the Country SkyAuthor: Grace S. (Grace Smith) Richmond, Rogers, Frances [Illustrator]Language: English
- Under the Great BearAuthor: Kirk Munroe, Howard GilesLanguage: English
- Under the Greenwood Tree; Or, The Mellstock Quire: A Rural Painting of the Dutch SchoolAuthor: Thomas HardyLanguage: English
- Under the LilacsAuthor: Louisa May AlcottLanguage: English
- Under the Ocean to the South Pole; Or, the Strange Cruise of the Submarine WonderAuthor: Rockwood, RoyLanguage: English
- Under the Rebel's ReignAuthor: Charles Neufeld, Charles Mills SheldonLanguage: English
- Under the RoseAuthor: Frederic Stewart IshamLanguage: English
- Under the SkylightsAuthor: Henry Blake FullerLanguage: English
- Under the StormAuthor: Charlotte M. (Charlotte Mary) YongeLanguage: English
- Under the Waves: Diving in Deep WatersAuthor: R. M. (Robert Michael) Ballantyne, Pearson [Illustrator]Language: English
- Under Two FlagsAuthor: OuidaLanguage: English
- Under Western EyesAuthor: Joseph ConradLanguage: English
- Understood BetsyAuthor: Dorothy Canfield FisherLanguage: English
- UndertowAuthor: Kathleen Thompson NorrisLanguage: English
- UndineAuthor: La Motte-Fouqué, Friedrich Heinrich Karl, Freiherr de, Charlotte M. (Charlotte Mary) YongeLanguage: English
- UndineAuthor: La Motte-Fouqué, Friedrich Heinrich Karl, Freiherr de, Bunnett, F. E. (Fanny Elizabeth)Language: English
- UndineAuthor: La Motte-Fouqué, Friedrich Heinrich Karl, Freiherr de, Macgregor, Mary [Adapter], Katharine CameronLanguage: English
- Une femme d'argentAuthor: Hector MalotLanguage: French
- Une Intrigante sous le règne de FrontenacAuthor: J. B. (Jean Baptiste) CaouetteLanguage: French
- Une page d'amourAuthor: Émile ZolaLanguage: French
- Une Pupille GenanteAuthor: Roger DombreLanguage: French
- Une vieAuthor: Guy de MaupassantLanguage: French
- Une Vie, a Piece of String and Other StoriesAuthor: Guy de MaupassantLanguage: English
- Une ville flottanteAuthor: Jules VerneLanguage: French
- Uneasy MoneyAuthor: P. G. (Pelham Grenville) WodehouseLanguage: English
- Unelmiensa uhri: RomaaniAuthor: Marja SalmelaLanguage: Finnish
- UngavaAuthor: R. M. (Robert Michael) BallantyneLanguage: English
- Ungava Bob: A Winter's TaleAuthor: Dillon Wallace, Palmer, Samuel M. [Illustrator]Language: English
- UniAuthor: Sulo M. HytönenLanguage: Finnish
- Unknown to History: A Story of the Captivity of Mary of ScotlandAuthor: Charlotte M. (Charlotte Mary) YongeLanguage: English