Danger intensifies for the Shadowhunters as the New York Times bestselling Infernal Devices trilogy comes to a close.If the only way to save the world was to destroy what you loved most, would you do it? The clock is ticking. Everyone must choose. Passion. Power. Secrets. Enchantment. Danger closes in around the Shadowhunters in the third and final instalment of the bestselling Infernal Devices trilogy.