Troy Polamalu was the guiding spirit behind a Pittsburgh Steelers dynasty that won two Super Bowls and led the NFL in total defense five times during his 12-year career. His explosiveness and instinct shone on the field, yet is is Polamalu's grace and character, his humility and dignity that have made the greatest impression on those closest to him. This biography, the first written on the Steelers' Hall of Famer, was over a decade...