This was an incredible read and a window onto a period of history and a people I knew almost nothing about. What I particularly liked about it was that the book worked in three acts. The first part detailing the crimes and the circumstances that made the Osage people both so incredibly wealthy and so ideally situated to be abused, the second with the investigation and prosecution and with the nascent FBI and the agents at the heart of the case, and the final--and in some ways most interesting--act dealing with David Grann's own journalism, the modern day Osage, and the incredible evidence and prolific violence of the early twentieth century that was targeted at the Osage. Grann's frustration and simmering anger is a powerful fuel and one that should charge up readers to fight against modern day injustices against Native tribes in the US and beyond just as fiercely.