"Move Your Shadow" is a biography of Muhammad Ali, written by Joseph Lelyveld and first published in 1992. The book traces Ali's life from his childhood in Louisville, Kentucky, to his rise as a boxing champion and his activism in the civil rights movement. Lelyveld explores Ali's complex personality, his religious and political beliefs, and his impact on American culture. The book also examines Ali's struggles with Parkinson's disease, which he believed was caused by the repeated blows to the head he suffered in the ring. With its insightful and nuanced portrait of one of the most iconic figures of the 20th century, "Move Your Shadow" is considered a seminal work of sports biography and a valuable contribution to the study of American history and culture.