Whispering Nickel Idols (Garrett, P. I. Series #11) by Glen Cook
Garrett’s having a pretty good morning until, five minutes in, he finds a strange child named Penny Dreadful poking around his apartment. Before he can figure out who the mysterious urchin really is, he’s hired to investigate how an old crime boss ended up in a coma—leaving his beautiful, criminally insane daughter to run the family business.
The boss’s daughter has some lascivious designs on Garrett—and some deadly ones, too. But she’s not the only one dreaming up ways to finish off the endangered private eye—who now has to figure out why everyone is suddenly after him...