Admittedly, I listened to this book, which may have colored my response to it. On the other hand, I have difficulty with books where seemingly unrelated plot-lines all merge together in the end or never get tied up. On the other hand, the setting and cultural details of the Navajo and Hopi tribes, not to mention the big-bad federal agents are always interesting.
I know there's a trend in some camps to denigrate writers who write about an ethnicity to which they do not belong. It seems to me Hillerman was diligent in his research, and to suggest that to write about something you must have experienced it yourself, would just about destroy all literature.
In the end, pretty good, but not one of my Hillerman favorites.