Scrivener's moon - Philip Reeve

The seventh awe-inspiring adventure in the World of Mortal
Engines series by superb writer Philip Reeve, at the height
of his powers.

Before London can launch itself, young engineer
Fever Crumb journeys to the wastelands of the North to seek
out the ancient birthplace of the Scriven mutants. In the chaotic
weeks before battle begins, Fever finds a mysterious black pyramid.

The extraordinary secrets it contains will change her world
forever.

Mortal Engines is now a major motion picture from Peter
Jackson's studio,WingNut Films and stars Hera Hilmar,
Robert Sheehan & Hugo Weaving.