Mortal engines - Philip Reeve

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, and is now released with
a film tie-in cover. The first installment 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.
"No 11-to-16-year-old should miss the superbly imagined debut novel
from Philip Reeve" - The Times
"This big, brave, brilliant book combines a thrilling adventure story
with endless moral conundrums" - Guardian