California Demon by Julie Kenner.
I read so many series that I hardly have time to find new books. Really. So what am I doing starting a new one? But how could I resist that title?
Kate Connor could be Buffy Summers, grown up and married with kids. Altlhough, technically, Kate is a Demon Hunter, not a Vampire Slayer. Like Buffy, Kate started killing Bad Guys when she was just a kid. Then she married her Hunting partner, and they retired to start a family. But he's killed in what appears to be a random mugging, and though Kate eventually marries again and has another child, she discoveres that Demon Hunters can never really hang up their crossbows.
In this book, Kate has to deal with demon(s?) who are targeting the high school that her daughter Allie attends. It starts a little slowly, but the excitment soon picks up.
This is a fast, fun read. My only regret is that I've been unable to find the prequel, Carpe Demon.