In the 1920s, the richest people per capita in the world were members of the Osage Indian nation in Oklahoma. After oil was discovered beneath their land, they 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. . . . In Killers of the Flower Moon, (a New York Times Bestseller and National Book Award Finalist), David Grann revisits a shocking series of crimes that eventually became one of the first major homicide investigations of the newly formed FBI. Based on years of research and startling new evidence, the book is a masterpiece of narrative nonfiction, as each step in the investigation reveals a series of sinister secrets and reversals. But more than that, it is a searing indictment of the callousness and prejudice toward American Indians that allowed the murderers to operate with impunity for so long. Killers of the Flower Moon is utterly compelling, but also emotionally devastating. (Soft cover, 352 pp., photos)