Windfall by Rachel Caine - The continuing adventures of the Weather Wardens and the Djinn who serve them. In this book, the Djinn are on the verge of an all out war with the wardens. It seems they're tired of a life of servitude.
I've enjoyed these books for the urban fantasy that they are. Sometimes there's a bit of romance thrown in (which makes them a bit too Chick Lit for me) but she writes action better than most female authors I know. I'm sure I'll keep reading these adventures as long as she keeps churning them out.