"Melissa Chapman was 23 years old and part of a happy, healthy, loving family. She had a decent job, a boyfriend she cared about, and friends she enjoyed. Yet on the first of May in 1982, she said good-bye to all of it. Carrying a puppy named Gypsy, she climbed aboard a horse and rode away from everything, heading west. With no cell phone, no GPS, no support team or truck following with supplies, Chapman quickly learned that the reality of a cross-country...