"This hefty biography may be the deepest dive yet into the life of Muhammad Ali," AARP.

This hefty biography may be the deepest dive yet into the life of Muhammad Ali — “the son of an uneducated sign painter [who] became the most famous man in the world,” as Eig puts it. The author, now working on an Ali documentary with Ken Burns, captures the enigmatic boxer and activist from his youthful days as Cassius Clay in the Jim Crow South to his years as “the Greatest” and his later battle with Parkinson’s disease.