I can say that virtually every urban fantasy that I have come across has a mystery element to it. If you can name one that doesn't, please let me know. Anyway, when I read the first Jennifer Rardin title, I was blown away. Not only is there a bit of a mystery element to them, but they're pretty much spy novels. When book four came out, I posted this regarding a tag on the promo card that came with my copy in which someone had dubbed the series Spy-Fi. I still think it's absolutely brilliant.
In this latest installment (no spoilers for the others, so don't worry), Jaz and team are sent to Scotland to protect a coven leader who has a hit put out on her by a group of weres. When Jaz and Vayle and Cole arrive, with Jaz's annoying father in tow, they discover that said witch has a bit of a ghost problem on top of everything else. Not only that, but the witch seems to have some tricks of her own up her sleeve and Jaz is bound and determined to find out what it is, even if it directly conflicts with the official orders.
Each new book brings new revelations about each of the characters. I dare you to read them and not completely fall in love with the series. I like them that much!
Readers who like Kim Harrison and even Charlaine Harris will like this series. Jaz is spunky and has some issues (she talks to her dead grandmother who lives in her head) and the books are actually pretty funny. Rardin's also great at throwing in pop culture references that I always get a kick out of (I lurve Simon Pegg and Hot Fuzz!).