In this conclusion of the tale begun in Over Sea, Under Stone, Will Stanton, the Welsh boy Bran, and the Drew children try to locate the crystal sword that alone can vanquish the strong forces of Dark.
- ISBN10 1416949682
- ISBN13 9781416949688
- Publish Date 8 May 2007 (first published 1 July 1977)
- Publish Status Out of Stock
- Publish Country US
- Imprint Margaret K. McElderry Books
- Edition Reprint ed.
- Format Paperback (US Trade)
- Pages 274
- Language English