Stones Unturned (Menagerie)

"A powerful, demonic force has escaped from the infernal real - putting the human world in dire peril. It seeks an ally in Danny Ferrick, the youngest member of the Menagerie - a changeling who is already tormented by his dark, primal urges, the legacy of his demon father. Tempted into sampling the horrific but thrilling existence of a full-fledged demon, Danny is on the edge of renouncing all that makes him human. Now time is running out for the other members of Doyle's team as they struggle to save their friend friend from falling into darkness - and taking all of humanity with him ..."--P. [2] of cover.