One deep, dark night, as all of the monsters are preparing for bed, Little Baby Mummy bravely searches for his mother until he sees a truly terrifying creature.

"Mummy Cat prowls his pyramid home, longing for his beloved owner. As he roams the tomb, lavish murals above his head display scenes of the cat with his young Egyptian queen. Hidden hieroglyphs deepen the tale and are explained in an informative author'snote"--

Jack and his younger sister take a trip in their tree house back to ancient Egypt, where they help a queen's mummy continue her voyage to the Next Life.

When reports of a mummy terrorizing the New Mouse City Museum flood the Rodent's Gazette's telephone lines, Geronimo Stilton, editor-in-chief, searches for an explanation to prove that there is no mummy.