When Bob and Mary arrive at their Granny's for the summer holidays they are delighted. But this year their big, rough cousin Ralph is staying as well. One rainy day, Granny tells them about a beautiful necklace that disappeared 100 years ago, and soon Bob and Mary find a secret passage.
- ISBN10 0099341808
- ISBN13 9780099341802
- Publish Date 17 May 1990
- Publish Status Out of Print
- Out of Print 10 August 2021
- Publish Country GB
- Publisher Penguin Random House Children's UK
- Imprint Red Fox
- Edition New edition
- Format Paperback
- Pages 96
- Language English