This is the 7th awe-inspiring adventure in the }Mortal Engines{ series. In a future land once known as Britain, nomad tribes are preparing to fight a terrifying enemy, the first ever mobile city. Before London can launch itself, young engineer Fever Crumb must journey to the wastelands of the North. In the chaotic weeks before battle begins, Fever finds a mysterious black pyramid. The secrets it contains will change her world forever. Paperback edition.