James and Cordelia must save London - and their marriage - in this thrilling and highly anticipated conclusion to The Last Hours series from the #1 New York Times and USA TODAY bestselling author Cassandra Clare. Chain of Thorns is a Shadowhunters novel.

Cordelia Carstairs has lost everything that matters to her.

In only a few short weeks, she has seen her father murdered, her plans to become parabatai with her best friend, Lucie, destroyed, and her marriage to James Herondale ...