"Killers of the Flower Moon" is a nonfiction book by David Grann about the Osage Indian murders. The book tells the story of the brutal murders behind white settlers attempted dispossession of an Osage familys Oklahoma lands, under which lay some of the worlds most valuable oil fields. The story revolves around Mollie Burkhart, an Osage woman whose three sisters and mother all perished under mysterious circumstances. Her sister, Minnie, and mother, Lizzie, both weakened and eventually died of what doctors called "peculiar wasting illnesses," while her sister, Anna Brown, was the victim of the murder that kicked off the Reign of Terror. The book offers historical context for the Osage Nation and the lawmen from a brand-new federal agency who descended on their land. The book is a masterpiece of narrative nonfiction, as each step in the investigation reveals a series of sinister secrets and reversals. The story is emotionally devastating and a searing indictment of the callousness and prejudice toward American Indians that allowed the murderers to operate with impunity for so long. A film adaptation directed by Martin Scorsese is set for release in October 2023.