America had been invaded and conquered. Six men knew a secret that could defeat the invaders, but it could not be used openly. They would have to operate undercover, as a sixth column....
- ISBN10 0671720260
- ISBN13 9780671720261
- Publish Date 1 January 1988
- Publish Status Active
- Publish Country US
- Imprint Baen Books
- Format Paperback
- Pages 256
- Language English