FEVER CRUMB is the stunning prequel to Philip Reeve's brilliant science fantasy quartet.

It is set many generations before the events of Mortal Engines, in whose dazzling world huge, predatory cities chase and devour each other.

Now, London is a riot-torn, ruinous town, clinging to a devastated landscape and hiding an explosive secret.

Is Fever, adopted daughter of Dr Crumb, the strange key that will unlock its dangerous mysteries?