Predator’s Gold By Philip Reeve

After their airship is attacked by the Green Storm, Tom and Hester find themselves in the icy city of Anchorage and now have to fight their way out of the plaque-infested city filled with thieves and savages before the Huntsman of Arkangel makes his next appearance in this dramatic sequel to Mortal Engines. An ALA Best Book for Young Adults. Reprint.