![Captain Underpants #4: Captain Underpants and the Perilous Plot of Professor Poopypants (PB) [OLD]](http://childrenstreehouse.ca/cdn/shop/products/f48980755666a0a39808cdf4190440ea_{width}x.png?v=1598989734)
![Captain Underpants #4: Captain Underpants and the Perilous Plot of Professor Poopypants (PB) [OLD]](http://childrenstreehouse.ca/cdn/shop/products/f48980755666a0a39808cdf4190440ea_580x.png?v=1598989734)
Captain Underpants #4: Captain Underpants and the Perilous Plot of Professor Poopypants (PB) [OLD]
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!