Author: Geronimo Stilton
After successfully investigating the case of the stolen cheese, all Thea Stilton wants to do is take a 'nice relaxing bath'. She is a special correspondent for her brother's newspaper The Rodent's Gazette . When she reaches home, she receives a letter from the headmaster of the Mouseford Academy. Thea has been invited to teach a journalism class. Excited to return to her old school, she sails to Whale Island where the school is situated. On reaching the island, she meets five interesting mouselings. Although she is happy to return, there's something amiss. Not long after, a student goes missing. Thea and her new friends set out to unravel the secret codes and legends that finally lead them to solving the mystery of the missing student.