If you're willing to take this walk, by the middle of it what Boye has been experiencing and relating to you will gently and subtly make you more aware of the world and your place in it. By the end of the walk and the book, you will have shared with Boye and his Cheyenne friends their humanity and yours will be the better for it.
That's a big bite for a book on a singluar event in Cheyenne history, which most of us know little or nothing about. I'm not sure how Boye did it. Probably he used skill, tact, wit, and humanity. That's probably all it took, but it was enough.