The book the award winning movie is based on. The book investigates the series of murders targeting the Osage Nation in the 1920s, after oil was discovered on their land, revealing a sinister conspiracy. The book details how these crimes led to one of the first major investigations by the newly formed FBI, uncovering a shocking web of corruption and greed. Through meticulous research and gripping storytelling, Grann sheds light on a dark chapter of American history and the fight for justice.