geronimo stilton #19: "lost in translation"

Everyone's favorite time-traveling mouse has to rescue the Rosetta Stone from the clutches of the evil Pirate Cats. During Napoleon's 1798 campaign in Egypt, Lieutenant Pierre-François Bouchard found the Rosetta Stone. But he doesn't know that Pirate Cats have already replaced the original piece with their own version. Now it's up to Geronimo and friends find the real Stone and give it back to history!