Eternity Engine

When the seas part, a hidden path opens from Shipwreck Island to the Enemy's City, exposing the ruins of a long-lost empire. Ellie Lancaster, a young orphan, and her friends must stop a looming war as Kate's army marches north and the Enemy's power grows. The uncovering of the Eternity Engine an ancient, powerful machine adds a dire new threat, for it can remake or destroy the world. With humanity's future at stake, Ellie and her companions must confront both the Enemy and the dangerous machine.