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.

Petey the Cat is out of jail, and he has a brand-new lease on life. While Petey's reevaluated what matters most, Li'l Petey is struggling to find the good in the world. Can Petey and Dog Man stop fighting like cats and dogs long enough to put their paws together and work as a team? They need each other now more than ever -- Li'l Petey (and the world) is counting on them!

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! When Harold and George turn fourth-grade teacher Ms. Ribble into the evil Wedgie Woman, she gives the wedgie of doom to unsuspecting people who stand in her way--including principal-turned-superhero Captain Underpants.

The monstrous Turbo Toilet 2000 is determined to take revenge on George, Harold, and Captain Underpants.

"Legendary storyteller Stephen King goes into the deepest well of his imagination in this spellbinding novel about a seventeen-year-old boy who inherits the keys to a parallel world where good and evil are at war, and the stakes could not be higher--for that world or ours. Charlie Reade looks like a regular high school kid, great at baseball and football, a decent student. But he carries a heavy load. His mom was killed in a hit-and-run accident when...

The Bad Guys, Mr. Wolf, Mr. Shark, Mr. Snake, and Mr. Piranha, want to be heroes, and they decide that the way to do it is to free the 200 dogs in the city dog pound--but their plan soon goes awry.

Having changed the course of human history after unwittingly wondering what could be worse than going to prison, George and Harold are shot through time back to kindergarten, where they are subjected to bullying and a clueless school principal.

"When we last left our hero, Max Crumbly, he had crash-landed on top of a Mighty Meat Monster pizza after taking a late night tumble through the vents at South Ridge Middle School--and he was completely surrounded by three ruthless criminals! Will Max be shredded to bits like mozzarella cheese on the hard and crunchy pizza crust of doom? Can his friend and sidekick, computer whiz Erin, help get him out of this sticky situation alive?"--Page 4 of cover....

"The Bad Guys have strangely acquired superpowers! But their powers might be, well, defective. They can only do things like blow their own pants off in public. Not exactly what you'd call hero-caliber skills. Defective or not, the Bad Guys have a job to do. With Dr. Marmalade ready to destroy the world, Mr. Wolf, Mr. Snake, Mr. Piranha, and Mr. Shark finally have their chance to be (super)heroes! And this time, they may just get some help."--Amazon. When...

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.