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.

When George and Harold use their traveling purple potty to travel to another dimension where the school is nice and the principal, Mr. Krupp, thinks they're funny, they meet up with their evil twins and must face their cleverest enemies ever -- themselves.

Fone Bone, Phoney Bone, and Smiley Bone are run out of their home, Boneville, and become separated in the wilds, but better fortune begins when the three cousins reunite at a farmstead in a deep forested valley, where Fone meets a young girl named Thorn. In Out From Boneville, volume 1 of this 9-book epic, the three Bone cousins, Fone Bone, Phoney Bone, and Smiley Bone, are separated and lost in a vast, uncharted desert. One by one, they find their...

George, Harold, Captain Underpants, and Sulu the Bionic Hamster battle the three Ridiculous Robo-Boogers in an attempt to turn the Bionic Booger Boy back into Melvin Sneedly.

Only Captain Underpants can stop the three evil space aliens who have invaded Jerome Horwitz Elementary School and turned everyone into lunchroom zombie nerds.

"When we last left our hero, Max Crumbly, he had crash-landed on top of a Mighty Meat Monster pizza after taking a late night tumble through the vents at South Ridge Middle School--and he was completely surrounded by three ruthless criminals! Will Max be shredded to bits like mozzarella cheese on the hard and crunchy pizza crust of doom? Can his friend and sidekick, computer whiz Erin, help get him out of this sticky situation alive?"--Page 4 of cover....

Nate goes up against Gina, the class brainiac.

Leafstar, having escaped from the Twoleg's home with the help of Billystorm and her Clanmates, finds more trouble when Sol joins the ranks of the SkyClan and his actions bring about a disaster, leaving Leafstar to decide if trusting a stranger in her ranks is worth risking the clan's future.

George and Harold have really done it this time-- they've created a monster! She's faster, smarter, and more evil than anything the world has seen before--she's Wedgie Woman! With the help of her horrible robots and her horrendous hairdo, Wedgie Woman is on a mission to take over the world, and she'll give a whopping wedgie to anyone who stands in her way--including Captain Underpants.

Phoebe, Marigold, and Marigold's sister, Florence Unfortunate Nostrils, are headed to summer drama camp where they'll face the daunting tasks of writing, producing, and acting in an entirely original play.