The gripping story of an epic prairie snowstorm that killed hundreds of newly arrived settlers and cast a shadow on the promise of the American frontier. January 12, 1888, began as an unseasonably warm morning across Nebraska, the Dakotas, and Minnesota, the weather so mild that children walked to school without coats and gloves. But that afternoon, without warning, the atmosphere suddenly, violently changed. One moment the air was calm; the next...