Unbroken: A World War II Story of Survival, Resilience, and Redemption is a 2010 non-fiction book by Laura Hillenbrand, author of the best-selling book Seabiscuit: An American Legend (2001). Unbroken is a biography of World War II hero Louis Zamperini, a former Olympic track star who survived a plane crash in the Pacific theater, spent 47 days drifting on a raft, and then survived more than two and a half years as a prisoner of war in three brutal Japanese prisoner-of-war camps.

Unbroken has spent more than four years on The New York Times best seller list, 14 weeks at number one, it is the 5th longest-running nonfiction best seller of all time.