In the 1920s, the richest people per capita in the world were members of the Osage Nation in Oklahoma. After oil was discovered beneath their land, the Osage rode in chauffeured automobiles, built mansions, and sent their children to study in Europe. Then, one by one, the Osage began to be killed off. One woman, Mollie Burkhart, watched as her family was murdered. Her older sister was shot. Her mother was slowly poisoned. And it was just the beginning, as more Osage began to die under mysterious circumstances. In this book, David Grann revisits a shocking series of crimes in which dozens of people were murdered in cold blood. But more than that, it is a searing indictment of the callousness and prejudice toward Native Americans that allowed the murderers to operate with impunity for so long.