About “The Secret of Sigma Seven”
A secret organization coded as Sigma Seven threatens national security with espionage operations. The Hardys work to dismantle the spy ring before catastrophic damage occurs.
Book details
- First published
- 1991
- Latest edition
- 2014 · ISBN 9781481421973
- Pages
- 160
Frequently asked questions
How many pages is The Secret of Sigma Seven?
The Secret of Sigma Seven by Franklin W. Dixon has 160 pages.