If historical fantasy is a genre, this book fits. Great “you are there” feeling about turn of the century (1899 to 1900) New York City, while hard core fantasy by dropping the titular fantasy characters into that time and place, and watching the natives squirm.
Only occasionally does Wecker’s local color intrude on the story, which has a large and varied cast. In fact, a couple characters are so similar it’s hard to keep them straight at first. Lots of radical changes of locale and time makes the opening chapters hard going, but stick with it. You will be rewarded by a excellent supernatural tale.
The religion of the various characters—or lack thereof—it treated realistically and respectfully.
No quibbles. Give yourself time to be immersed in both the mythology and the history of the tale.
For the author’s first published novel, it’s a great start.