The electrifying conclusion to the New York Times bestselling Last Hours series. Cordelia Carstairs’ world is falling apart. In the past weeks, her father has been murdered, her beloved sword has been cursed, herplans to become parabatai with her best friend have dissolved, and her marriage is disintegrating before her eyes. Running away to Paris with Matthew Fairchild has kept her from these problems for a little while — but when her husband James Herondale shows up there, very much against the idea that their marriage is over, Cordelia’s denial is shattered. She knows she still loves James, but how to pursue a reconciliation when Belial, the Prince of Hell she and her friends banished only a week ago is back already? Not to mention that Belial’s ally, Tatiana Blackthorn, has escaped from her imprisonment. Cordelia, James, his sister Lucie and their friends Matthew, Thomas and Christopher, have no way to find out what Belial and Tatiana are planning – but they know something bad is coming, and soon. If the Shadowhunters, the city of London, and the world are to be saved, Cordelia, James, and Lucie will have to muster their courage, swallow their pride, and figure out how to love and trust one another again – before evil forces much greater than them crush them, and everything they love, into dust.