What does it mean to be the "greatest of all time," or the GOAT? For Serena Williams, it means winning her first major at 17 years old--and staying on top ever since. For Diana Taurasi, it means multiple Olympic gold medals with USA Basketball and leading the WNBA in all-time scoring by more than 2,000 points. Katie Ledecky, Mia Hamm, Lindsey Vonn, and Simone Biles have similar resumes particular to their sport. Their inspirational stories of hard work, dedication, and accomplishment are laid out for readers of this set, written with struggling and reluctant readers in mind.