Florence Griffith Joyner became the world's fastest woman. Javier Sotomayer overcame his fear of heights to set a new world high jump record. Alex Honnold climbed Yosemite's El Capitan without a rope. This book features 12 captivating stories about athletes who pushed themselves to their limits. Each includes attention-grabbing photos and fascinating facts. Sidebars go beyond the basics, and prompts invite readers to think for themselves. Additional mini-stories encourage further exploration.