Dav Pilkey

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

George and Harold are forced to contemplate a world without 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.

A paperboy and his dog enjoy the quiet of the early morning as they go about their rounds.

A snotty situation ensues when Melvin Sneedley, an academically-gifted student, turns into the Bionic Booger Boy and must be stopped by George, Harold, and Captain Underpants. By flipping the pages, the reader may view animated illustrations.

Friends Ook and Gluk are always getting into trouble with their village chief until they pass through a portal into a future run by the chief's descendant, where they learn kung fu so they can return to the past and free their people.

Dragon is lonely so he goes looking for a friend and when an apple falls on his head he is convinced that he has found one; but at home Apple is quiet and unresponsive, and when a visit to the doctor only makes things worse, Dragon mourns the loss of his friend--until an apple tree grows where Apple is buried.

General Jackrabbit and his Robo-Rabbits from Jupiter attempt to take over the world on Ricky Ricotta's birthday.

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.

Ricky Ricotta fears the worst when he hears rumors that Uncle Unicorn is hatching a plan to build a destructive robot of his own that will finally help him succeed in taking over the Earth and becoming sole ruler of it.