When the kingdom of Madria receives a rumor that the Zorians may attack with a secret weapon, possibly under the direction of the Dark Lord, the Seven Sleepers become involved.
- ISBN10 0613886151
- ISBN13 9780613886154
- Publish Date 1 September 2000
- Publish Status Out of Print
- Out of Print 6 April 2021
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English