The Perilous Plot of Professor Poopypants (Captain Underpants #4 PB)

Dav Pilkey

Professor Pippy P. (Pee-Pee) Poopypants is a brilliant scientist, but his ridiculous name means no one takes his fantastic inventions seriously. As a science teacher, he decides that if anyone makes fun of his name, he might just go on the rampage with the Shrinky-Pig 2000....