Insightful and hard-hitting, this biography brings readers the world of Muhammad Ali, regarded by many as the greatest fighter in history. From the day he first walked into a boxing gym as 12-year-old Cassius Clay to his spectacular series of heavyweight title fights in the '60s and '70s; from his uplifting triumphs and fiery personality to his controversial spiritual stance and his tragic diagnosis with Parkinson's Disease, this book is packed with the most in-depth look at the world's most remarkable champion.