The Mortal Instruments: City of Past Ghosts (Book 1)

Clary is pronounced dead by the Clave, leaving Jace heartbroken and never the same. But when Jace saves a mundane that isn't a mundane at all and bares great resemblance to his dead Clary (not to mention the same name), questions and the past ghosts are raised, once again making him question the Clave. But convinced...