I have to admit that, while reading this, I was constantly putting the book down and going online to look at pictures of Mesa Verde and the archaeological ruins there. There's such a sense of place in these books, set in national parks as they are, and being able to get actual visuals of the places where Anna is working and investigating is so useful. (Not to mention the fact that I now have another entry on my bucket list.)

That being said, while I liked this novel I did figure out what was going on relatively early - in one sense, at least. I hardly ever get the actual culprits right and didn't this time either, but so much of the problem here was based on science that I had a fairly good idea what was causing all the illnesses and deaths. It's fun to be right, although given my history with murder mysteries it'll probably be ten years before I get to be right again.