While in Germany with their father, Mark and Penny Daring and their friend David become involved in trying to figure out how a fortune in jewels was stolen from a well-protected castle.
- ISBN10 156179368X
- ISBN13 9781561793686
- Publish Date 22 June 1995
- Publish Status Active
- Out of Print 17 December 2011
- Publish Country US
- Imprint Focus on the Family Publishing
- Format Paperback (B-Format (198x129 mm))
- Pages 130
- Language English