After their father is killed by operatives of Phoenix Enterprises--a front for high-tech military equipment smugglers--the Hardys travel to Stockholm to avenge his death. Frank and Joe are ready to take any steps necessary to expose the truth, even if it involves going into the deadly heart of the Phoenix maze.
- ISBN10 0606020357
- ISBN13 9780606020350
- Publish Date 31 December 1993 (first published 1 July 1992)
- Publish Status Unknown
- Out of Print 25 March 2015
- Publish Country US
- Imprint Demco Media Inc
- Edition Turtleback School & Library ed.
- Format Hardcover
- Language English