Bright Futures Development has announced the invention of a powerful new solar energy cell, and the Hardy boys have gone undercover to protect it from industrial spies. Frank and Joe follow a trail of deceit and double-dealing and discover that the truth behind the solar power source is much darker than they suspected.
- ISBN10 0833571923
- ISBN13 9780833571922
- Publish Date 1 April 1991 (first published 1 January 1991)
- Publish Status Out of Stock
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English