"Seabiscuit: An American Legend" is a biography that tells the story of Seabiscuit, a racehorse who became a symbol of hope during the Great Depression. The book, written by Laura Hillenbrand, details Seabiscuit's rise from an underdog to a champion, highlighting his unique personality and the challenges he faced on and off the racetrack. The narrative also focuses on the lives of the people around Seabiscuit, including his trainer Tom Smith, his jockey Red Pollard, and owner Charles Howard. Together, they formed a bond that helped propel Seabiscuit to fame, making him a beloved figure in American sports history.