While doing research for a school essay about a reclusive old mountain man, two boys fall into an abandoned mine shaft from which only the old man can rescue them.
- ISBN10 0394953940
- ISBN13 9780394953946
- Publish Date 12 August 1982
- Publish Status Out of Print
- Out of Print 28 September 2021
- Publish Country US
- Imprint Alfred A. Knopf Books for Young Readers
- Format Hardcover
- Language English