John Justin Mallory is a regular PI who became stuck in an alternate Manhattan in a previous book Stalking The Unicorn, and this adventure picks up some time after that, after Mallory has established his new business in this magically influenced place. For whatever reason, I read the third one after the first (my mistake).
I think I'm done with these Fables (if Resnick should write another one, I'll skip it). The story is supposed to be a humorous noir-type mystery, which was fun one or two times, but with the third the humor is getting a bit stale. This book was also the weakest of all three, so if I did go back, I just wouldn't bother with this one.