Captain Underpants and the Perilous Plot of Professor Poopypants (Captain Underpants #4)
George and Harold aren't bad kids. They just like to 'liven things up' for everybody. Unfortunately, their thoughtful jokes sometimes get them into a LOT of trouble. And when Professor Pippy P. Poopypants becomes their new science teacher...well, George and Harold almost cause the entire planet to be taken over by a maniacal, mad-scientist guy in a giant robot suit! Who will stop the perilous plot of Poopypants?!?! This looks like a job for Captain Underpants!