A young boy is ushered into a subterranean world where he encounters a civilization and kingdom unlike anything above ground.
- ISBN10 0435122630
- ISBN13 9780435122638
- Publish Date 28 June 1982 (first published 1 January 1980)
- Publish Status Out of Print
- Out of Print 12 July 2000
- Publish Country GB
- Imprint Pearson Education Limited
- Edition New edition
- Format Paperback
- Pages 144
- Language English