The search for sunken treasure /
Geronimo Stilton.
- New York : Scholastic, 2006.
- 110 p. : col. ill. ; 20 cm.
- Premiers' Reading Challenge Years 3 and 4 .
Geronimo and his friends set sail to the Ratlapagos Islands to search for a sunken treasure. He soon begins to suspect that they aren't the only ones looking for the treasure.