When Chris finds an old safe in his grandparents' basement, he and his friends begin a hunt for the missing combination that leads to a revelation about the donor of the cross on the hill overlooking Mill Valley.
- ISBN10 0613961021
- ISBN13 9780613961028
- Publish Date 1 April 1996
- Publish Status Active
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English