When a colonist from a forgotten artificial moon returns to Earth, thirteen-year-old Merry and her grandfather must battle to save their culture from the visitor's strange powers.
- ISBN10 0140326111
- ISBN13 9780140326116
- Publish Date 31 March 1988 (first published 23 August 1984)
- Publish Status Out of Print
- Out of Print 26 October 2004
- Publish Country GB
- Imprint Puffin Books
- Format Hardcover
- Pages 149
- Language English