Stieg Larsson's The Girl Who Played with Fire
Larsson is truly the master of the slow build, as the murders of two writers working on an expose of Sweden's sex trade leads to the involvement of all of the titular girl's friends and enemies, as well as the police, and it all comes to a crazy and scary head. And having read this one right after the first one, and seeing all the hints that lead to the craziness in this one, it felt like a much stronger story than last time I read it. I can't wait to read the third one! Which luckily is sitting on my couch right now. Still don't know why they released it months ago in England and not here.