When Jace vanishes with Sebastian, Clary and the Shadowhunters struggle to piece together their shattered world and Clary infiltrates the group planning the world's destruction.

"Darkness has descended on the Shadowhunter world. Chaos and destruction overwhelm the Nephilim as Clary, Jace, Simon, and their friends band together to fight the greatest evil they have ever faced-- Clary's own brother. Nothing in this world can defeat Sebastian-- but if they journey to the realm of demons, they just might have a chance ..."-- Provided by publisher.

When seventeen-year-old orphaned shapechanger Tessa Gray is kidnapped by the villainous Mortmain in his final bid for power, the London Institute rallies to save her, but is beset by danger and betrayal at every turn.

Cordelia Carstairs, a Shadowhunter trained to battle demons, travels with her brother to London where they reconnect with childhood friends but soon must face devastating demon attacks in the quarantined city.

While the Clave teeters on the brink of civil war, Julian and Emma take desperate measures to put their forbidden love aside and focus on saving the world of Shadowhunters before the parabatai curse destroys everyone.

Shadowhunter Emma Carstairs and her parabatai Julian Blackthorn race to stop a demonic plot that threatens Los Angeles--