While searching in Iceland for a missing sailor sought by an insurance company, the teen-age detective brothers uncover a plot threatening the life of a United States astronaut and the secrets of NASA's moon project.
Dixon, Franklin W. Hardy boys mystery stories ; 48.
The Hardy boys mystery stories
The Hardy boys mystery stories ; 48
Hardy, Frank (Fictitious character) -- Juvenile fiction.
Hardy, Joe (Fictitious character) -- Juvenile fiction.
Iceland -- Juvenile fiction.