The Demon's Librarian - Lilith Saintcrow

Demons are preying on schoolchildren in her city, so Francesca Barnes does what any red-blooded librarian would do-she does some research and goes hunting. But the books she finds in a secret cache don't tell her the whole story. Chess has no idea what she's just stepped into or just how special she is. Orion is Drakul, part demon, and a loyal servant of the Order. He doesn't expect a motorcycle-riding librarian to be messing around with demonic forces, and he doesn't expect her to smell so damn good. But Ryan's got bigger problems. His partner has disappeared, and the forces of Darkness are rising. Now Chess is Ryan's only hope of finding his partner, and Ryan is Chess's only hope of survival because the demons now know Chess exists and that she is the heir to a long-lost power that could push back their dark tide. If Ryan can keep her alive long enough, she just might be the key to destroying the demons completely. But Ryan doesn't know he's been betrayed by the very Order he serves. And if Chess does, by some miracle survive, he won't ever be able to touch her again. . .