I've just finished reading the Girl with the Dragon Tattoo (I'll return it next Friday, Mary) by Stieg Larsson. I found the first 50-100 pages hard going, and I very nearly put it down, but then the action picked up and it was a very enjoyable read. I don't normally read thrillers, but the unusual characters in this one kept me interested. I did guess the resolution about 20 pages before it was spelled out, but I hadn't a clue until then (maybe I'm not that bright after all).
No wonder this has been such a bestseller. And the controversy with regards to his life partner's rights to his legacy has probably added to the sales.