A darkling plain - Philip Reeve

A DARKLING PLAIN is the final thrilling instalment in Philip Reeve's
brilliantly-imagined creation, the world of the Traction Era,
where mobile cities fight for survival in a post-apocalyptic fuure.
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 willhange
the world, while Hester must face an implacable foe with the
means and the will to destroy the entire human race.
"Big, brave, brilliant" GUARDIAN
Philip Reeve has won the CILIP Carnegie Medal, the Guardian Children's
Fiction Prize, the Nestle Children's Book Prize and the Blue
Peter Book of the Year.