Cirrus@Austlit

'A mummified chunk of brain. A Fish Mummy sucked down a garbage chute. And a chamber of purple magic … that absorbs people like a sponge! On a rescue mission, boy Pharaoh Bab Sharkey becomes trapped in Egypt’s greatest pyramid. What is the terrible truth about the Unpharaoh’s past? Can Bab unearth the secrets of the Spongy Void? And will Prong and Scaler be thrown into a mummy museum forever?'

Source: Publisher's blurb.