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- Our Revolution: Essays on Working-Class and International Revolution, 1904-1917
- Our Scandinavian Heritage
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- Our Service, Our Stories - Indiana Veterans Recall Their World War II Experiences
- Our Sisters' Keepers
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- Our Sons Our Heroes: Memories Shared by America’s Gold Star Mothers from the Vietnam War
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- OurChildren'sHeritageSecondEdition: A History of Clarkston and Independence Township
- Ourika : This Is to Be Alone, This, This, Is Solitude!
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- Ourselves Unborn
- Out and About London
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- Out in the Boondocks: Marines in Action in the Pacific
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- Out of a Nation's Past: of Dotys, Halls Ramsays and Schlademans
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- Out of Brownsville: Encounters with Nobel Laureates and Other Jewish Writers
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- Out of Latvia: The son of a Latvian immigrant searches for his roots
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- Out Of My Life, By Marshal Von Hindenburg. Vol. I
- Out Of My Life, By Marshal Von Hindenburg. Vol. II
- Out of Necessity: George Washington's Surrender of Fort Necessity to the French
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- Out of the Ashes: The Story of a Survivor
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