The Adventures of Captain Underpants tells the story of two mischievous fourth-graders, George Beard and Harold Hutchins, who love to prank their school and create their own comic books. Their favorite creation is Captain Underpants, a superhero who wears only his underwear and cape. After they hypnotize their mean school principal, Mr. Krupp, he becomes Captain Underpants whenever they snap their fingers. This unlikely hero goes on ridiculous and humorous adventures, often fighting against villains like Professor Poopypants. The book is filled with comic-style illustrations, making it a fun and engaging read for young audiences. The story celebrates creativity, friendship, and the power of imagination.