The Girl With The Dragon Tatoo

This trilogy of books is awesome. I wrote about them here, here and here. You should definitely read them first.

I initially resisted watching the Swedish films, thinking they would be crappy compared to the books. On the insistence of one of my friends, who watched them after reading the books, I eventually saw them on DVD and they were great. They felt very much like the definitive films of the books to me. You should definitely watch these after reading the books.