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.

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.

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.

The world's most evil corporation of the future invades Caveland, Ohio and enslaves the inhabitants, until a time portal takes Ook and Gluk to the year 2222, where they meet a wise new friend who provides them with the means of saving the day.

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.

"Flippy, Molly, Li'l Petey, and twenty-one baby frogs each have something to say. Naomi and Melvin don't see eye to eye and Poppy perceives the world differently than her siblings. Will the baby frogs figure out how to work together and appreciate one another's point of view -- both inside and outside the classroom?"--

"Dog Man is down on his luck, Petey confronts his not so purr-fect past, and Grampa is up to no good. The world is spinning out of control as new villains spill into town. Everything seems dark and full of despair. But hope is not lost. Can the incredible power of love save the day?"--Provided by publisher.