Dav Pilkey

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.

Principal Krupp once again turns into the superhero Captain Underpants in order to save the world, and Jerome Horwitz Elementary School, from the evil talking toilets and the Turbo Toilet 2000.

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.

Hally, the Tosis family dog, has such bad breath that Mr. and Mrs. Tosis plan to give her away, until she proves to be an invaluable watchdog.

Only Captain Underpants can stop the three evil space aliens who have invaded Jerome Horwitz Elementary School and turned everyone into lunchroom zombie nerds.

All the other dogs make fun of Oscar the dachshund until one Halloween when, dressed as a hot dog, Oscar bravely rescues the others.

A mouse named Ricky Ricotta and his giant flying robot attempt to save the world from an invasion of massive mutant mosquitoes from Mercury.

Ricky Ricotta, a small mouse, is being bullied at school, but when he rescues a powerful robot from its evil creator, he acquires a friend and protector--and saves the city from Dr. Stinky.

"Evil Uncle Unicorn attempts to dominate earth by using a Ladybot to trick Mighty Robot." -- Provided by publisher.

"Ricky and his Mighty Robot have built the coolest fort ever, and they can't wait for the fun to begin! But then Cousin Lucy arrives and plans to turn it into a princess castle--what a party pooper! Things completely fall apart when Nimrod Nightcrawler, a wicked worm from Neptune, digs a tunnel under Ricky's fort, trapping the Mighty Robot. Now it's up to Ricky and Lucy to put a stop to this nightmare--and save their friend!" -- Page [4] cover.