The book hooked me pretty early on with, basically, a riddle. As the mystery it unfolds and expands into something much more interesting, but I won't ruin anything by saying more. The main characters are interesting (especially Lisbeth) and the writing is well done. He often understates things, and this makes certain scenes much more powerful than they might have been if the melodrama had been poured on. The novel is basically a slow burn up until the end where everything becomes a little more frantic and is quickly resolved. Still very enjoyable, and I was hooked, but be aware that this isn't a fast paced thriller from page 1.
This book has received positive reviews for good reason, and is a must read for anyone who likes mystery novels. I tend towards reading SF/Fantasy but this was a pleasant surprise and I'll be sure to check out later novels in the series.