In a time when Shadowhunters are barely winning the fight against the forces of darkness, one battle will change the course of history forever. Welcome to The Infernal Devices trilogy, a stunning and dangerous prequel to the New York Times bestselling Mortal Instruments series. The year is 1878. Searching for her missing brother, sixteen-year-old Tessa Gray descends into London's dark supernatural underworld and finds herself up against the Pandemonium Club, a secret organization of vampires, demons, warlocks, and humans. Equipped with a magical army of unstoppable clockwork demons, the Club is out to rule the British Empire, and only Tessa and her Shadowhunter allies can stop them....