The Submarine Caper
Subtitle: Hardy Boys #68
By: Franklin W. Dixon ; illustrated by Leslie Morrill.
Contributors: Morrill, Leslie H.
Series: The Hardy boys mystery stories
Publisher: Wanderer Books
Published: 1981
Place of publication: New York
Language: eng
Number of pages: 187
Subjects: Mystery and detective stories; Germany -- Fiction
Description: On a visit to Germany the Hardy brothers investigate the theft of plans for a newly invented submarine and the mysterious disappearance of valuable coins and paintings.