In trouble with their principal because of their comic books, George and Harold decide to create a new epic novel.

THE BABY IS BACK! Dav Pilkey's pint-sized powerhouse returns for another amazing adventure! Now in paperback with a shiny foil cover! George and Harold (the co-stars of the enormously popular Captain Underpants series) are in big trouble again! Their mean principal, Mr. Krupp, has had it with their comic books. But the boys aren't giving up, and they decide to create an all-new epic novel about a subject they've never tackled before! Dr. Dilbert Dinkle started his career as an ordinary, everyday evil genius/inventor/bank robber. But when he awakens one day transformed into a walking, talking puddle of pee, he vows to destroy every toilet in town. Will the devious Dr. Dinkle and his conniving cat, Petey, ruin restrooms for the rest of us? Or could this be a job for the death-defying duo of Super Diaper Baby and Diaper Dog?

This ebook edition includes bonus material about the making of the books, sketches by Dav Pilkey, deleted scenes and more! George and Harold (the co-stars of the enormously popular Captain Underpants series) are in big trouble again! Their mean principal, Mr Krupp, has had it with their comic books. But the boys aren't giving up, and they decide to create an all-new epic novel about a subject they've never tackled before! Dr Dilbert Dinkle started his career as an ordinary, everyday evil genius/inventor/bank robber. But when he awakens one day transformed into a walking, talking puddle of pee, he vows to destroy every toilet in town. Will the devious Dr Dinkle and his conniving cat, Petey, ruin restrooms for the rest of us? Or could this be a job for the death-defying, dynamic duo of Super Diaper Baby and Diaper Dog?

Meet Super Diaper Baby -- the most powerful peewee to ever pack a punch.

Move over, Dav Pilkey, it's George and Harold's turn to tell the tale of the all-new superhero who's faster than a speeding stroller and more powerful than diaper rash. Make way for Super Diaper Baby!

George and Harold's time-traveling Purple Potty lands them in a crazy place in the eighth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!

George and Harold's latest prank backfires in the second book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!

Fourth graders George Beard and Harold Hutchins invent the wedgie-powered superhero Captain Underpants in the first book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!

Alien lunch ladies attack in the third book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!

Professor Pippy P. Poopypants takes over science class at Jerome Horwitz Elementary in the fourth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!

The 10th Dog Man adventure from the worldwide bestselling author and artist Dav Pilkey. You'll howl with laughter! Dav Pilkey's wildly popular Dog Man series appeals to readers of all ages and explores universally positive themes, including empathy, kindness, persistence, and the importance of doing good.

Stickers, jokes, flip-o-ramas, and puzzles are featured in this second compendium starring Captain Underpants and his friends.

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

The next great Dog Man adventure from the worldwide bestselling author and artist Dav Pilkey. You'll howl with laughter!

The 10th Dog Man adventure from the worldwide bestselling author and artist Dav Pilkey. You'll howl with laughter!

Li'l Petey gets caught in some family drama in the eighth Dog Man book from worldwide bestselling author and artist Dav Pilkey.

The heroic hound is send to jail in the sixth Dog Man book from worldwide bestselling author and artist Dav Pilkey.

Our favourite Captain Underpants characters George and Harold have created a new hero who digs into deception, claws after crooks, and rolls over robbers. When Greg the police dog and his cop companion are injured on the job, a life-saving surgery changes the course of history, and Dog Man is born. With the head of a dog and the body of a human, this heroic hound has a real nose for justice. But can he resist the call of the wild, to answer the call of duty? Dog Man will dig into many mysteries.

This boxed set showcases the first four books of this best-selling chapter book series about the Waistband Warrior, and includes a special Captain Underpants Whoopee Cushion. All of the characters from the first four books are featured in Pilkey's new art for the case. Illustrations. Consumable.