Captain Underpants and the Perilous Plot of Professor Poopypants is the fourth hilarious adventure in the Captain Underpants series. The boys face their most disgustingly named villain yet: Professor Pippy P. Poopypants from the faraway country of Yquack. Professor Poopypants is a misunderstood genius who is fed up with people laughing at his silly name. He creates a terrible invention to shrink everything in the world and rename it something equally ridiculous. George and Harold must rely on the mighty, crime-fighting Captain Underpants to stop the Professor's "name-change-a-tor" and save the world from being completely renamed with silly potty humor.
