Tom Swift and His Submarine Boat: or, Under the Ocean for Sunken Treasure by Victor Appleton
The fourth story in the classic series about Tom Swift, the intrepid young inventor and adventurer.
The young and intrepid Tom Swift is off to an undersea adventure! Tom's father, an accomplished scientist, has just completed an experimental submarine. Together, they set off to recover a sunken treasure of the coast of South America. Unfortunately, a rival team is pursuing them to the treasure in a race against time and hostile powers.
Beloved by generations of children, the Tom Swift series has entertained boys and girls for over 100 years.