In a stark time-marches-on fashion, this one is very much a politically incorrect book all around. Since I don't mind that, I was enjoying it, but at some point around a third in, Nora stopped participating in dialogues and got relegated to audience surrogate, and I wasn't having as much fun.
I don't know that I was invested much in the mystery(show spoiler)
but I have to confess I stayed for the train-wreck the characters are. As a rule, I avoid noir because it relies too much on drudgery, dialogue error and backtrack, and it bores me. Here, everyone is so messed up or downright insane I could get my jollies from their hijinks (sometimes horror inducing ones), and I coasted the whole book on this amused sense that I was reading a cast of grotesques caricatures.
Call me morbid, I had fun.