The book is broken up into three chronicles: ONE is the history of the Osage people up to the beginning of the murders. TWO is the (F)BI's investigation and outcome. THREE is the what has happened to the Osage since then with much of it being told from the author's point-of-view researching all of this. The audiobook had a different reader for each of the sections, and they were all fine. I found that I only really enjoyed Chronicle TWO; the others were interesting but not where the meat of the story lie and not really anything to do with the (F)BI's investigation.