Urban fantasy but set in gangster Chicago rather than right now. This is a surprisingly refreshing change. Mick, our fairy hero, is adopting the whole sub-Marlowe grizzled PI vibe which normally annoys me, but it annoys him too, so he gets a pass. And the world is convincingly put together. The masquerade is fairly weak here -- an awful lot of Chicago's underworld has some vague idea about the actual underworld -- and Oberon's frosted-glass-office narration gets a little tiresome from time to time, but this is worth a read.