Which biography includes more primary sources speaking directly about the subject of the biography of Joyner kersee?

The biography "The Greatest: The Story of Joyner-Kersee" by the author Pat Jordan includes more primary sources that speak directly about the subject, Jackie Joyner-Kersee. This work incorporates interviews, personal anecdotes, and firsthand accounts that provide deeper insights into her life and athletic career. These primary sources help to create a more intimate and comprehensive portrait of Joyner-Kersee compared to other biographies.