I had trouble rating this one. For sheer enjoyment I'd give it a four out of five; it's really fun, with plenty of wacky characters and wild ideas. However, I do have a couple of stylistic niggles.
First, combat felt a wee bit too much like a D&D session to me. Things were over-described a lot (such as where each exit was in a room). Even though the characters acknowledge early on in one major raid on a demon-infested house that their opponents probably have preternatural hearing AND already know they're there, they stand around in the hallway debating and planning strategy endlessly.
Second, if I'm going to read erotic romance novels then I'm willing to set aside a certain amount of my normal sensitivity to overwrought description. That only goes so far, however, and a line that describes a lover's... ahem... as "a white-hot match that reached into my center to ignite my flame" just makes me snicker.
Finally, I found I couldn't buy into the love plot, which is tough on a romance (although since Chase, Delilah's boyfriend, isn't around for much of the book, it isn't as bad as you'd think). I realize the author seems to want to make some sort of point about not giving up on troubled relationships with imperfect people, but Chase comes across as enough of a jackass, and the author just doesn't make me believe in some sort of all-overcoming love between the two of them, that I seriously found myself cheering on Zach, the competition for Delilah's affections. Maybe this is one of those things I would have been able to get on board with if I'd read the previous books.
I realize that after spending so much space on what I didn't like, I've probably made it sound as though I didn't enjoy Night Huntress. However, that isn't the case. There's plenty of action, suspense, and wacky human-fae politics to keep things jumping, and I loved reading about all of that. Consider my rating a 3.5---higher if my stylistic issues don't bother you.