City of Lost Souls: The Mortal Instruments 5

City of Lost Souls is the fifth book in Cassandra Clare’s The Mortal Instruments series, and it plunges the Shadowhunters into their darkest battle yet.

After the events of City of Fallen Angels, Jace has vanished—and when he resurfaces, Clary is horrified to discover he’s been magically bound to her evil brother, Sebastian Morgenstern. The two now share a twisted connection, making it impossible to harm one without destroying the other. As the Clave debates whether to sacrifice Jace to stop Sebastian, Clary takes matters into her own hands, infiltrating their inner circle to uncover Sebastian’s true plan.

Meanwhile, Simon, Isabelle, Alec, and Magnus race against time, striking dangerous bargains with faeries, demons, and the Iron Sisters in a desperate attempt to save their friend. But as Clary walks a razor’s edge between loyalty and betrayal, she must decide how far she’s willing to go for love—and whether Jace is truly lost.