These are the books by Philip Reeve that are reviewed on this site:
It's a town eat town world. The great traction city of London is prowling round the Great Hunting Ground looking for prey. But, if London hopes to use re-created weapons of mass destruction in its bid for superiority, then London must expect to have enemies - Tom, Third Class Apprentice of the Guild of Historians, and the dreadfully disfigured Hester Shaw, for a start . . .
Compelling sequel to Mortal Engines. Love, jealousy, betrayal, anger, loyalty and bravery. Brilliant!