Angels & Demons Novel vs. Film
From the beginning, it's important to remember that Angels & Demons is not a treasure hunter story. It is a thriller, but essentially a murder investigation. With that in mind, here are my thoughts as I watched the film and compared it to the novel.
The movie certainly streamlines the exposition in the story, eliminating the trip to Cern among other things.
There are numerous character changes, most notably changing the Camerlengo into an Irishman. I'm not sure why those changes were made.
All in all, this feels more like watching a Hannibal Lector movie than any kind of treasure hunt, especially with the string of gruesome deaths.
There is also a general sense of irreverence, especially when the motivation of the main villain is revealed. This really stands out when the film is compared to ones like Raiders of the Lost Ark and Indiana Jones and the Last Crusade, something that I'll examine more closely when writing about The Da Vinci Code.