Professor Pippy P. (Pee-Pee) Poopypants is a brilliant scientist, but his ridiculous name means no one takes his fantastic inventions seriously. And now he's on the rampage! He's armed with fiendish inventions Shrinky-Pig 2000 and the terrible Gerbil Jogger 2000. Can Captain Underpants stop him?

The fourth book in Dav Pilkey's mega-bestselling Captain Underpants series. Now with super-cool foil covers! Shiny! Fun! George and Harold aren't bad kids. They just like to "liven things up" for everybody. Unfortunately, their thoughtful jokes sometimes get them into a LOT of trouble. And when Professor Pippy P. Poopypants becomes their new science teacher . . . well, George and Harold almost cause the entire planet to be taken over by a maniacal, mad-scientist guy in a giant robot suit! Who will stop the perilous plot of Poopypants?!!? This looks like a job for Captain Underpants!

Celebrate the 25th and a half anniversary of THE ADVENTURES OF CAPTAIN UNDERPANTS with a special edition featuring a BRAND NEW 32-page DOG MAN comic! George and Harold are best friends who enjoy making their own comic books. Together they've created the greatest superhero in the history of their elementary school: Captain Underpants! His true identity is SO secret, even HE doesn't know who he is! Tra-la-laaaaa! It's can't-miss fun! After the Captain Underpants adventure, join George and Harold as they share their never-before-seen bonus comics: Captain Underpants Meets Dog Man and Dog Man and the League of Misfits. The Adventures of Captain Underpants is the first book in the worldwide bestselling Captain Underpants series by Dav Pilkey. For even more adventures, creativity, and humor, be sure to check out Dav's Dog Man and Cat Kid Comic Club graphic novels. Reading gives you superpowers!

George and Harold accidentally create a monster in the fifth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man! George and Harold are always good at using their imaginations, and that drives their mean homeroom teacher, Ms. Ribble, crazy! But this time, they've come up with much more than a silly prank... With her horrendous hairdo and two rabid robots, Wedgie Woman is well on her way to world domination, and only the Waistband Warrior can stop her!

Tippy Tinkletrousers is back in the ninth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man! George and Harold are behind bars for a crime they didn't commit! But just as they are settling into their new life, they are pulled from prison by a time-traveling tyrant named Tippy Tinkletrousers! Now the boys are taking a trip back in time to the carefree days of kindergarten, when the scariest thing they had to face was not evil mad scientists or alien cafeteria ladies but a sixth-grade bully named Kipper Krupp, the nephew of their clueless school principal. And because George and Harold don't invent Captain Underpants until they're in fourth grade, the clever kindergartners are on their own. Can they beat the bullies with brainpower instead of Wedgie Power?

Harold and George's crazy creation is back — in an adventure that's WEDGIER than ever! He defeated Dr Nappy. He terminated the talking toilets. But is Captain Underpants ready for three massive, tentacled space aliens (in disguise)? Has he met his match in the Giant Man-Eating Dandelion of Doom...?

George and Harold's nemesis Melvin Sneedly goes from snooty to snotty in the sixth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man! George and Harold are up to their old tricks again, and when their latest prank makes a direct hit on school brainiac Melvin, he decides to get even! But in the blink of an eye -- and the sneeze of a nose -- the Bionic Booger Boy is born! Can Captain Underpants clean up this catastrophe, or will the mucous monster make a mess of things?

George and Harold have created the greatest superhero in the history of their school — and now they're about to bring him to life! MEET CAPTAIN UNDERPANTS! HIS TRUE IDENTITY IS SO SECRET, EVEN HE DOESN'T KNOW WHO HE IS! FIGHTING FOR TRUTH, JUSTICE AND ALL THINGS PRE-SHRUNK AND COTTONY!

Tra-la-laaa! Dav Pilkey -- ahem -- we mean, George and Harold, the authors of SUPER DIAPER BABY, are back with their second epic novel! Meet Ook and Gluk, the stars of this sensationally silly graphic novel from the creators of Captain Underpants! It's 500,001 BC, and Ook and Gluk's hometown of Caveland, Ohio, is under attack by an evil corporation from the future. When Ook, Gluk, and their little dinosaur pal Lily are pulled through a time portal to 2222, they discover a future world that's even more devastated than their own. Luckily, they find a friend in Master Wong, a martial arts instructor who trains them in the ways of kung fu. Now all they have to do is travel back in time 502,223 years and save the day!

George and Harold have to figure out how to fix history in the tenth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man! George and Harold have been turned into evil zombie nerds doomed to roam a devastated, postapocalyptic planet for all eternity! Unfortunately, the boys can't count on Captain Underpants for help because Tippy Tinkletrousers and his time-traveling hijinks prevented George and Harold from creating him in the first place! With Tippy having changed the course of human history forever, George and Harold will have to figure out a way to change it back!