In a faraway corner of a ruined world, a mysterious boy is building a fl ying machine. Birds help him, and so does a beautiful, brilliant, half-human engineer called Fever Crumb. But powerful enemies stalk them—either to possess their revolutionary invention, or to destroy the secrets of flight forever. The breathtaking new story from the awesome world of Mortal Engines. Award-winning writer Philip Reeve creates an extraordinary new city of moving buildings and human birds in a classic novel that is sure to thrill fans young and old.