Geronimo Stilton

"Geronimo and his friends Trappy, Benjamin, and Thea travel to 1799 Egypt to stop the wicked pirate cats from interfering with the discovery of the Rosetta Stone--the key tool to decode ancient Egyptian hieroglyphics. To complicate matters, Geronimo and Thea's grandfather, 'Tank' William Shortpaws, is along for the ride, and boy is he cranky! The mice spoil the plot of the pirate cats and return to the present... a present ruled by Pharaoh Catardone. Have the pirate cats won the past to conquer the future?"--Back cover.