The Mortal Instruments: City of Lost Souls | p25-p154

Question #22 

So far in the book, the Clave have been looking for Jace and Sebastian for two weeks. Clary has had to testify with the Mortal Sword a few times. Clary, Simon, Isabelle and Alec have made a deal with the Faerie Queen to steal rings with telepathic abilities in order for her assistance to find Jace. Clary was just about to steal the rings when she finds Jace and Sebastian in the Institute's library.

The Mortal Instruments: City of Lost Souls by Cassandra Clare