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Principal Krupp once again turns into the superhero Captain Underpants in order to save the world, and Jerome Horwitz Elementary School, from the evil talking toilets and the Turbo Toilet 2000.

When George and Harold use their traveling purple potty to travel to another dimension where the school is nice and the principal, Mr.

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 hypnotize their principal into thinking that he is the superhero Captain Underpants, he leads them to the lair of the nefarious Dr.

Presents time management and organization strategies and tools for school principals, covering such topics as to-do lists, filing systems, note cards, communication, delegation, summer activities, and taking care of oneself.

A snotty situation ensues when Melvin Sneedley, an academically-gifted student, turns into the Bionic Booger Boy and must be stopped by George, Harold, and Captain Underpants.

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 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.

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.

A new school year presents the Freaky Joe Club with its greatest challenge, saving their school's nickname from a new principal with a mysterious aversion to hamsters.

Richard and Ted become suspicious of the creepy new principal at Crosswell Elementary School when students who get sent to his office return with very changed, strangely submissive attitudes.

Contains three stories in which brothers and best friends Wilbur and Orville Riot catch a thief, overthrow a king, and find a treasure, and includes rules to some of their made-up games.

The third Captain Underpants adventure like you've never seen it before -- in FULL COLOR! George and Harold have played a trick or two on nearly everyone at Jerome Horwitz Elementary.