The final installment of the Engelsfors Trilogy—an international sensation with rights sold in 29 countries—The Key combines thrilling action and dark magic with all the passion and drama of teen life. The result is nothing less than explosive. By the end of the second book, Fire, the remaining Chosen Ones know they are the last defense against the mysterious, demonic forces that have been plaguing Engelsfors. The Chosen Ones are still coming to terms with their loss when evil strikes again, barely a month after the showdown in the school gym. They have no chance to recover, and no choice but to rally together to try to prevent the apocalypse—even while their personal dramas threaten to tear them apart. Time is running out for the Chosen Ones to fulfil the prophecy and save the world, but whether they succeed or not, one thing is certain: Everything will change.