He was a track star and a bombardier in World War II. But nothing stands out more about Louis Zamperini's life than the unimaginable way his inner strength and survival instincts overcame the war's worst extremities, including weeks adrift at sea and the cruelest of Japanese POW camps. Exceptional author Laura Hillenbrand (SEABISCUIT) tells his gripping story in her masterful book, UNBROKEN.