I also read this book prior to this challenge. I feel it is an important account of the treatment of native Americans and gives a crucial picture of how the FBI came into being.  The book disturbed me when I read it, in fact, I swore off of non-fiction and picked up my first paranormal book. As a pic, I was well versed in the cruelties inflicted on Black and Brown people but through school or lack of schooling I believed that the Native American suffered massive land grabs and forced assimilation that disrupted their cultural integrity. What was revealed in this book was much worse.