Hello, mouse friends! Join me, Geronimo Stilton, in solving this whisker-licking-good mystery. Find clues along with me as you read. Together, we'll be super-squeaky investigators! Lucky me: I won a relaxing vacation on a cruise ship! Too bad I always get seasick. I hoped this time would be different, especially with the charming Lily Lovelyfur on board. But when a jewel thief struck, my friends and I had to catch the crook! Could we solve this mystery?