Half Broke Horses: A True-Life Novel

Walls reimagines the life of her grandmother, Lily Casey, who by age six was helping her father break horses. At 15, she left home to teach in a frontier town--riding 500 miles on her pony to get to her post. She learned to drive a car, fly a plane, and with her husband, managed a vast ranch in Arizona, surviving tornadoes, droughts, floods, and the Great Depression.