Let the Right One In
I really like it, despite that they have taken out one of the main characters from the book. It's a logical thing to do but that also makes one of the best scenes go missing (it's towards the end nonetheless).
Regardless of that, it's a great film which I really recommend. I have heard that they are planning to make most of the others books by the same author into films. This is great news (I have read all of them except the latest one).
There are also rumors about an American remake. That doesn't make a lot of sense but I guess that if you have to have all your films in English in order to see them that is good news too.