Interesting premise for a novel, and pretty well-written. Because of the premise (1930s alternate universe where magic and 1930s tech similar to our own coexist), many things are just easily taken as given, such as money values, clothing styles, etc., but when a guy uses a dime to pay for a coin-operated phone call, I was momentarily taken aback, since I can recall placing calls as a kid in the late 1950s using a nickel.
Of course, different “universe”/timeline, but still it did give me momentary pause.