The second book in a hilarious middle-grade mystery series from bestselling author Alex T. Smith! Ten-year-old Jacob Oolong and his best friend J. Algernon Pickle (a very dapper beaver detective) expect a relaxing South of France holiday filled with world-famous ice cream sundaes. Instead, they are plunged straight into an international crime wave! When Jacob's aunt accidentally swaps her tiara with a Duchess, the detective duo leaps into action. A hilarious case of mistaken identity lands them on the wrong boat, and suddenly the race is on to outwit a gang of notorious sea bandits and stop the thieves before they get away!.