On holiday in Cornwall, Simon, Jane and Barney Drew discover an ancient map in the attic of the Grey House, where they are staying with their mysterious Great-Uncle Merry. They know immediately that it is special. But it is much more than just a map. It is the start of a quest to find a grail, a source of great power that could contain - or resurrect - the powerful, age-old forces of evil in the world. And the Drews are not the only ones searching for it.
- ISBN10 1849411115
- ISBN13 9781849411110
- Publish Date 30 September 2010 (first published May 1965)
- Publish Status Out of Print
- Out of Print 9 February 2021
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Red Fox
- Format Paperback (B-Format (198x129 mm))
- Pages 368
- Language English