The trouble with those books is that they are SO absorbing, that you will read them in a day! If you havnt read the Girl With A Dragon Tattoo trilogy yet then those 3 books will keep you very occupied for at least a week.
I was a bit like that with the Twilight books (sorry to any non-Twilighters!) but also anything by Jodi Picoult. Especially Nineteen Minutes. Could not put that book down at all!
I started the immortal series but barely started the second book, doee it get better? I finished a little kore than half of the anita blake series i loved it, but it got less about the story and more about the... Hemhem.. But they were really good, wish i wouldve finished
The Hunger Games - it's a trilogy of books, being made into a film later this year. I originally saw the movie trailer and it looked so good I downloaded the books onto my kindle and read all 3 within a couple of days. Definitely the kind of book you just can't put down.