London is on the rampage again, pursuing a small mining town across the dried-up bed of the North Sea.
It's a quasi-Victorian futuristic world where cities prey on each other, recycle their parts and capture their inhabitants.
Tom embarks on a journey to return to the city that has abandoned him, accompanied by the cold and damaged Hester.
Shortlisted for the Whitbread Children's Book of the Year.
- Format: Hardback
- Pages: 272 pages
- Publisher: Pearson Education Limited
- Publication Date: 30/05/1970
- Category: Technology
- ISBN: 9780435130534