"On a school field trip to the museum, Dexter puts his brand-new super-secret spy skills to the test. Someone has broken into the Egyptian exhibit to steal Pharaoh Hun-Ga-Re's greatest treasure...a sacred sandwich that can raise the dead! But who could be hungry enough to want a six-thousand-year-old snack? With an army of robot ninjas, a mustachioed mystery man, and a sneaky new classmate lurking around every corner, it's up to Dex to find the petrified hoagie first and save the world from a monstrous mummy's ancient curse..."--Back cover.