MORTAL ENGINES launched Philip Reeve`s brilliantly-imagined creation, the world of the Traction Era, where mobile cities fight for survival in a post-apocalyptic future. Now, in time for the film debut, the critically acclaimed MORTAL ENGINES quartet is repackaged with a fantastic & eye-catching cover featuring new artwork. In the fourth & final brilliant installment of Philip Reeve`s award-winning quartet, after twenty years, the devastating world war between the predatory Traction Cities & their enemies is ending. Wren & her father Tom Natsworthy travel the Bird Roads in their airship, trying to forget Hester`s betrayal. But in the ruined wreckage of the city of London they make a discovery that changes everything. & Hester faces an implacable foe with the means & the will to destroy the entire human race.