Killers of the Flower Moon by David Grann

6 out of 10

In the 1920s, mostly by renting land to oil prospectors, the Osage people became exceptionally wealthy.  It is unknown how many of the tribe's people were murdered, but it is at least 60--possibly hundreds.  The killings were done one by one over many years in different styles (strangulations, drownings, stabbings, shootings, poisonings, bombings, etc.).  Bodies were found in various places--some were found far from the Osage Indian reservation in Oklahoma.  This would be the initial mystery for a newly created FBI.  There were many bureaucratic fumbles though eventually four people were tried and convicted.  Their motive was inheritance.  

This tragic event in American history deserves a spotlight.  It is a difficult read, though, for the fact that many points of the narrative remain absent.