Professor Pippy P. Poopypants takes over science class at Jerome Horwitz Elementary in the fourth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man! George and Harold are fourth-grade buddies with a penchant for practical jokes. When the boys' latest prank drives their science teacher over the edge, their clueless principal, Mr. Krupp, quickly hires a replacement: Professor Pippy P. Poopypants. Of course, George and Harold can't resist making fun of the Professor's silly name. But then the Professor retaliates by forcing everyone in town to change their own names to be equally silly, with colossal consequences!

Professor Pippy P. (Pee-Pee) Poopypants is a brilliant scientist, but his ridiculous name means no one takes his fantastic inventions seriously. And now he's on the rampage! He's armed with fiendish inventions Shrinky-Pig 2000 and the terrible Gerbil Jogger 2000. Can Captain Underpants stop him?

Bibliographic information, grade level, and annotations for nearly 7,500 fantasy books for grades 3-12 are given. The introduction discusses the history of fantasy, and awards presented to fantasy titles are listed.

Lists books by subject and title and recommends what book children and young adults should read next based on their previous likes and dislikes.

The fourth book in Dav Pilkey's mega-bestselling Captain Underpants series. Now with super-cool foil covers! Shiny! Fun! 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!