The book investigates a series of murders in the 1920s targeting the Osage Nation, whose members became immensely wealthy after oil was discovered beneath their land in Oklahoma. As the death toll climbed, the newly formed FBI took up the case and uncovered a chilling conspiracy. The narrative reveals the depths of corruption and the racial injustices that allowed the murderers to operate with impunity, shedding light on a largely forgotten chapter in American history where greed and prejudice led to the systemic exploitation and killing of Osage people.

The 7767th greatest book of all time