Nearly a quarter of a century on, Kram's coverage of the historic Ali-Frazier trilogy, in particular the climactic "Thrilla in Manila", form the basis for his book. But there is emphasis, too, on the boxers' lives prior to those fearsome duels and afterwards in retirement. Kram offers a personal edge to Ali's story that is sharpened by his own relationship with the boxer, which was fostered in gyms, restaurants, during car rides and at fight arenas. In particular, he takes aim at other acclaimed writers such as Pulitzer Prize winner Norman Mailer who settled upon Ali "like a mollusk".