I didn't see the movie The Girl with a Dragon Tattoo yet, but I decided to read the book instead. In fact, this is only the first book from a trilogy, now I'm actually at the third book and it gets better and better. If the first novel is about an old family mystery, the second and the third are getting into police investigations and secrete police activity, but keeping the main characters from the initial novel. Highly entertaining for a vacation on a tropical island :)