Amateur archeology sleuths follow geometric clues to find a pharaoh’s mummy. Matt and Bibi are the twin children of scientists invited to Egypt. First to enter the pyramid, the two are trapped inside when a secret door closes. Luckily, Bibi learned to read hieroglyphics before they left home. Along with the writing on the wall are geometric solids. The pair follows the clues leading them to count the faces on the solids. Definitely not an introductory text to geometric solids, this is more a reinforcement of the concept. The historical knowledge readers will take from this is a mix of factual and farcical. Limestone rock, papyrus scrolls and the antechamber filled with items needed for the afterlife are on target. The giant granite towers inside the pyramid and the carved wooden box that holds the pharaoh’s clean underwear are not. Attempting to be both entertaining story and teaching text makes this fall a little flat and the whole premise is silly. (Picture book. 8-11)