The Submarine Caper

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.

• Author
• Franklin W. Dixon, Leslie H. Morrill

• Format
• paperback

• Pages
• 187

• Series
• The Hardy Boys

• Publisher
• Wanderer Books

• Language
• english

• ISBN
• 9780671423391

• Genres
• mystery, adventure, childrens, fiction, detective, classics, action

• Release date
• 1981