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. The first instalment introduces young apprentice Tom Natsworthy and the murderous Hester Shaw, flung from the fast-moving city of London into heart-stopping adventures in the wastelands of the Great Hunting Ground. Repackaged with a stunning double cover and eye-catching new look that features the famous recycled 'Old-Tech' of Reeve's fantastic world.

Agents for peace are bringing an end to the devastating conflict between the roaming Traction Cities and their fanatical enemies while Wren and her father Tom travel the Bird Roads in their airship, trying to forget that Hester has betrayed them. In the ruined wreckage of the city of London they make a discovery that will change the world, while Hester must face an implacable foe with the means and the will to destroy the entire human race.

Tom and Hester's daughter, Wren, longs to escape the peace of static Anchorage. She craves the dangerous adventures her parents once had-and a charming submarine pirate is ready to take her to sea. But the mysterious object that she steals for him ignites a conflict that will tear the whole world apart...