George and Harold and their doubles, Yesterday George and Yesterday Harold, have been taking turns going to school, but when the doubles fall prey to their gym teacher, Mr. Meaner, and his method of mind control that turns students into attentive, obedient, perfect children, it is up to original George and Harold to strike back.

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. Diaper, where they must defeat his evil robot henchmen.

Having changed the course of human history after unwittingly wondering what could be worse than going to prison, George and Harold are catapulted through time back to their kindergarten days, where they are subjected to a sixth-grade bully and a clueless school principal.

General Jackrabbit and his Robo-Rabbits from Jupiter attempt to take over the world on Ricky Ricotta's birthday.

A small mouse and his best friend, a giant flying robot, attempt to save the Earth when an evil Martian monkey and his mechanical creations attack.

When the villain from Venus, Victor Von Vulture, invades Earth, a mouse named Ricky Ricotta and his robot must save the world by sending the villain and his vicious vulture army back home.

Principal Krupp, in the guise of his alter ego Captain Underpants, tries to come to the rescue when three evil space aliens infiltrate Jerome Horwitz Elementary School and turn everyone into lunchroom zombie nerds.

After an encounter with a skunk, Dog Man, now scarlet red after being dunked in tomato juice, is exiled but must find a way to save those who shunned him when an all-new, never-before-seen villain unleashes an army of A.I. robots.

"Excitement and imagination run wild as Naomi, Melvin, Poppy, Gilbert, Curly, and their siblings get back to making comics with originality and laughter. But wait--have they cleaned their rooms yet?! After their chores, the rambunctious group presents even more amazing mini-comics. By working together, the baby frogs discover that small things can have a huge impact"--

"Join Li'l Petey, Flippy, and Molly as they introduce comic making to twenty-one funny, rambunctious, and talented frogs. Can the trio help the class unleash their own creativity?"--Provided by publisher. "Li'l Petey, Flippy, and Molly introduce twenty-one rambunctious, funny, and talented baby frogs to the art of comic making. As the story unwinds with mishaps and hilarity, readers get to see the progress, mistakes, and improvements that come with...