Chain of thorns

Love, duty, and danger collide in Edwardian London, as the Shadowhunters face the greatest threat they have ever known.
In a few short weeks Cordelia Carstains has seen her father murdered, her plans to become parabatai with her best friend, Lucie, destroyed, and her marriage to James Herondale crumble before her eyes. Even worse, she is now bound to an ancient demon, Lilith, stripping her of her power as a Shadowhunter. She flees to Paris with Matthew Fairchild, but receives shocking news comes from home: Tatiana Blackthorn has escaped the Adamant Citadel, and London is under new threat by the Prince of Hell, Belial. The long-kept secret that Belial is James and Lucie's grandfather has been revealed, and the Herondales are under suspicion of dealings with demons. If Cordelia and her friends are going to save London-- and their families- - they will have to trust one another again. If they fail, they may lose everything-- even their souls. -- adapted from jacket