When John, Harry and Molly decide to visit an old ruin, a series of intriguing discoveries leads them deep underground and into the heart of Skytop Hill. However, little do they know what dark secrets they will uncover there.
| ISBN: | 9780753727058 |
| Publication date: | 1st July 2014 |
| Author: | Enid Blyton |
| Publisher: | Bounty an imprint of Octopus |
| Format: | Hardback |
| Pagination: | 352 pages |
| Series: | Enid Blyton: Adventure Collection |
| Genres: |
Action Adventure Children’s / Teenage fiction: Classic fiction |