An English schoolboy is snatched into another world by the magician scientist Salaman, who forces him to brave underwater terrors in a quest for the priceless Mirrorstone.
- ISBN10 0394883535
- ISBN13 9780394883533
- Publish Date 12 November 1986 (first published 23 October 1986)
- Publish Status Active
- Publish Country US
- Imprint Alfred A. Knopf Books for Young Readers
- Format Hardcover
- Pages 32
- Language English