"Meet Sam: an insolent pug--and incidental hero--who will stop at nothing to protect his family! When scientists Elaine and Gary Peterson adopt Sam to keep their son, Justin, company in the midst of a top-secret research project, they never imagine the precocious pup will cause more harm than good. But from chewing up Elaine's hair dryer (the "brain-melting heat cannon") to his inability to be house-trained (who could resist the 'pooping rug'?), the...

When the residents of a far-distant planet send a message to Earth asking for someone to meet with them, the President of the United States asks Stanley Lambchop, an all-American boy, to be his ambassador.

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.

Max and Erin continue the fight to protect South Ridge Middle School from Ralph and his henchmen, but Max's greatest challenge may be keeping his crush on Erin a secret.

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.

For centuries there have been rumors of another continent on the dragons' planet -- another land far across the ocean, populated by tribes of dragons very different from those we know. But there's never been any evidence, and most dragons dismissed the rumors as fairy tales. Until now. Because it turns out the stories are true. And the other tribes are coming.

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.

En la novena novela, Dav Pilkey lleva a los lectores a los tiempos en que Jorge y Berto estaban en kindergarten, cuando la mayor preocupación de los chicos era un abusón de sexto grado sobrino del director de la escuela. Y como Jorge y Berto no inventaron al Capitán Calzoncillos hasta cuarto grado, los chicos no tienen quien los ayude. No les queda más remedio que usar la cabeza para vencer al abusón.

Plain-Jane Jordan Johnston falls about in the middle of short and tall, plump or slim, blonde or brunette, neither gifted in school nor a flunk. She is average, and she hates it. Everyone else is better than she, but by the end of the year she has made a promise to herself--no matter the cost, she will find her talent.

Roto the helicopter and her pilot, Roy, fight a forest fire and rescue a dog. Endpapers feature a cross-section of a helicopter with parts labeled and facts about helicopters.