I just wrapped up reading "Inferno" by Dan Brown. I'd say that's on the lower end of the Robert Langdon books. Loved "Angels & Demons" and "The Lost Symbol" (and might as well mention Brown's "Digital Fortress" too, even though it's not a Langdon book, because it was great) but this one was a little bit flat. It follows Da Vinci Code's running and second-guessing formula; which the other two Langdon books do as well but he seems a bit more on top of things in those. I did get really into it about half way through though. Was a page turner as things unraveled and revealed itself. But the beginning was ultra slow. A good deal of it is pretty predictable and then the ending was weird in how much nothing actually matter.