Love, duty, and danger collide in Edwardian London, as the Shadowhunters face the greatest threat they have ever known.

Magnus Bane and Alec Lightwood must recover a book stolen by warlocks Ragnor Fell and Shinyun Jung, who are being controlled by a Greater Demon. Magnus Bane and Alec Lightwood are living together in a fabulous loft; their warlock son, Max, has started learning to walk, and the streets of New York are peaceful and quiet-- well, relatively. Until the night that two old acquaintances break into Magnus's apartment and steal the powerful Book of the...