In this stunning ninth book in the New York Times and USA TODAY bestselling Guardians of the Lost Cities series, Sophie and her friends discover the true meaning of power... and evil. Sophie Foster changed the rules of the game. Now she faces an impossible choice: When Take action. When to trust. When to let go. Her friends are divided and scattered, and Black Swan wants Sophie to focus on their projects. But her instincts lead her somewhere else. Stellarmoon—and the mysterious Elysian—may be the key to everything. But the search for truth in the Lost Cities always requires sacrifice. And as the Neverseen's plans come into terrifying focus, it seems that everyone has miscalculated. The greatest lie of the Lost Cities could destroy everything. And in the battle that follows, only one thing is clear: nothing will ever be the same.