Good Urban Fantasy Serial Novelists?

One of my absolute favorite authors is Francesca Lia Block and her novels are generally considered urban fantasy. I know her books are generally to be found in the teen fiction section, but they really are fabulous. She only has one series, The Weetzie Bat series which I love. My favorite of the series is Baby Beebop, but you can find the first 5 of the 6 books collected in a single volume called Dangerous Angels. The last book is called Necklace of Kisses. I also love Psyche in a Dress, Wasteland, and Ecstasia.