I think I might have liked the first book least of the series.

I found your review interesting, because it made me question why I liked it so much. I think the answer to that is that I came to it straight from other urban fantasy, which was all "tough powerful woman who is also gorgeous, surrounded by gorgeous men, gets to choose between multiple hot preternatural dudes while kicking preternatural tail all on her own. And all the dudes need her help."

After six or seven series' of those, finding a male version was a relief to me. It still is, because urban fantasy is predominantly about female narrators who get hot guys, notice hot guys, rescue hot guys and don't need hot guys.