Just read the Dan Brown book "Secret of Secrets".
It was an interesting read, although it followed his tried and tested formula of picking a location for the main action, and giving the reader an armchair tourists view of that location. In this case it was the city of Prague where all the main action took place. There's even a map showing the centre of the city and it has various important places marked out so that you can follow the action as it moves around the various landmarks. I've never been to Prague although my wife has, but from the story I think it would be an interesting place to visit. So I'm beginning to wonder if Dan Brown gets any sponsorship from the local tourist board wherever he sets the action?
I won't divulge any spoilers, but the main character is Robert Langdon, and as he's always been portrayed by Tom Hanks, it's him who I saw in my mind's eye when I read the story. There is one major twist in the story that is kept almost till the end, so it keeps you reading till the last page of the Epilogue.
It's quite a long(ish) book of nearly 700 pages, and has over a hundred chapters, but that's the way he writes them. I think it's so that each chapter can become a short scene in a filmed version of the story. It's a good tactic, because it does a lot of the hard work that some poor studio hack would have to do in order to make the story filmable. So he's inviting the film studios to get involved by this writing method I think.
Marks out of ten? Around 6/10 or 7/10 I think. It could have been less formulaic possibly, but then again I suppose it's what we've come to expect from Mr Brown, so he's treading a well-worn path with this one.