The Adventures of Captain Underpants is the original, outrageously silly, and highly successful book that launched the globally popular series by Dav Pilkey. The novel introduces George Beard and Harold Hutchins, two fourth-grade pranksters whose greatest invention is the superhero Captain Underpants. He is the alter ego of their mean, tyrannical principal, Mr. Krupp, whom they hypnotize using a cheap plastic ring. The book details the boys' initial mischief and the moment their creation takes on a life of its own when the hypnotized Mr. Krupp transforms into the semi-clothed, crime-fighting hero whenever he hears a snap. Their fun is short-lived when they face their first villain, the evil scientist Professor Poopypants. Full of flip-o-rama action, intentional misspellings, and empowering themes of creativity and friendship, this book sets the tone for the entire series, celebrating irreverent humor and the pure, unadulterated joy of being a kid.