I'm not clear on what you are saying (sorry, I'm old ;-)Read the Lost City of Z author, currently working on Osage Murders,maybe of some help.
Are you saying read the book "The Lost City of Z" or are you saying we should read about that author ? I found "The Two Lives of Sybil Bolton" very interesting*. I had a boss who knew some of the stories about the Osage county murders of Osage ladies etc.
* The name has changed for that book but I don't know what it is now.