When Professor Pippy P. Poopypants comes to Jerome Horwitz Elementary School to teach science, and he goes off the deep end because students make fun of his name, only Captain Underpants can save the school from the professor's perilous plot.

On title page author's name is crossed out and replaced with Gidget hamsterbrains. "Now in full color"--Title page. Originally published: New York : Blue Sky Press, c2000.