I got "Empire of the Summer Moon" by S.C. Gwynne from the local library. I read half way through it and realized that I HAD to own this book, so I ordered a hardbound from Amazon.com . It is readily apparent to me that the vast amount of research, verified information and direct quotes from period literature and the believable historical account of the rise and fall of the Nermernuh (Comanches), the most formidable native American fighting force that American forces ever faced, make this a "must own book". I am not a Historian, so I cannot swear to the authenticity of what Mr. Gwynne writes, but the documentation is quite significant and the bibliography is formidable to say the least. It is for tht reason that I want to own this book and it is one that I would encourage anyone with an interest in the history of the old west to own and read. For me I don't intend to just read it. I will STUDY it.