Joe Frazier was a quintessential pressure fighter. He came forward at all costs, throwing his vaunted left hook at opponents until he broke their spirits or bodies or, as was often the case, both. A great heavyweight champion by any standard of measurement, Frazier left his mark in his three-fight series against Muhammad Ali. In 1967, Ali had been stripped of his heavyweight crown and his license to box for refusing induction into the United States Army during the Vietnam War. In Ali's absence, an elimination tournament was held to determine his successor to the heavyweight throne. Frazier won the tournament, tearing through the division's contenders and establishing himself as the best active heavyweight in the world. When Ali's license to box was reinstated, a superfight was made between Joe Frazier, the undefeated reigning champion, and Muhammad Ali, the undefeated former champ. The fight, which...