In the second graphic novel of Geronimo Stilton and his time-traveling relatives, Geronimo’s family departs Mouse City in the middle of winter to go to Ancient Egypt, around 2484 BC.  Professor Volt has discovered an indication that someone is trying to change history which will affect the present.  Geronimo and family travel by time machine to the Egyptian civilization in the 4th dynasty ruled by Pharaoh Chephren.  Someone is trying to convince him to change the face of the Great Sphinx to that of a cat.  When Geronimo’s group obtain jobs in the palace, they discover the culprits are the Pirate cats.  They learn of the cats’ plan to over-throw the Pharaoh and are able to prevent it at the last moment.  The typical font color and style in other Geronimo books are still present in this graphic novel format.  Fact boxes add information about Ancient Egypt during Pharaoh Chephren’s reign.  If one can ignore a few inconsistencies (Geronimo surviving after being run over by a 2.5 ton block of stone, the dates mentioned for the time period – 2484 BC stated by Professor Volt and 2588-2563 BC referred to in a text box, and hungry crocodiles in the Nile at one moment and not the next – then this adventure has plenty of action!  Geronimo Stilton fans will enjoy reading this book.