Seabiscuit: An American Legend is a non-fiction book written by Laura Hillenbrand, published in 1999. The book is a biography of the Thoroughbred racehorse Seabiscuit. It won the William Hill Sports Book of the Year and was adapted as a feature film in 2003. It has also been published under the title Seabiscuit: The True Story of Three Men and a Racehorse. The author has been praised for her ability to convey a sense of historical times. The 2003 film Seabiscuit was adapted from the book.

Laura Hillenbrand is an American author of books and magazine articles. Her two bestselling nonfiction books, Seabiscuit: An American Legend (2001) and Unbroken: A World War II Story of Survival, Resilience, and Redemption (2010), have sold over 13 million copies, and each was adapted for film. Her writing style is distinct from New Journalism, dropping "verbal pyrotechnics" in favor of a stronger focus on the story itself.