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 0689500882
- ISBN13 9780689500886
- Publish Date 1 July 1977
- Publish Status Out of Stock
- Publish Country US
- Publisher Simon & Schuster
- Imprint Atheneum Books for Young Readers
- Format Hardcover
- Pages 352
- Language English