Night Fever - Ed Brubaker
A disaffected book editor gets insomnia while at a convention in Paris. He wanders into an underground masked ball for super-rich bored people, taking the identity of someone on the guest list. This leads him into a dark world of drugs and murder. Jonathan is not a hard boiled noir character, but an office guy who gets drawn into chaos and violence and finds he likes it, until it turns out he's the patsy. This isn't Brubaker's finest work — it's not as intricately plotted as Criminal, and there are some odd plot points that don't really go anywhere (like Jonathan finding his own dream in a manuscript), but it's a fun read.