Miguel Azaola Book order (chronological)

The best-selling Captain Underpants series may be in jeopardy, as the perilous plot of Professor Pippy P. Poopypants possibly puts an end to the protagonists -- permanently! Jorge y Berto no son malos chicos. Lo que pasa es que les gusta animar las cosas de vez en cuando. Así, sin proponérselo, están a punto de hacer que el profesor Pipicaca, un científico enloquecido y sin escrúpulos que se encuentra a bordo de un robot gigantesco, se apodere del planeta entero. ¿Quién desbaratará los perversos planes de Pipicaca? ¡Un nuevo trabajo para el Capitán Calzoncillos! Book Details: Format: Paperback Publication Date: 9/1/2002 Pages: 160 Reading Level: Age 8 and Up

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

When Harold and George turn fourth-grade teacher Ms. Ribble into the evil Wedgie Woman, she gives the wedgie of doom to unsuspecting people who stand in her way--including principal-turned-superhero Captain Underpants.

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.

A world without UNDERPANTS?!!! When we last saw our heroes, George and Harold, they had been turned into evil zombie nerds doomed to roam a devastated, postapocalyptic planet for all eternity. But why, you might ask, didn't the amazing Captain Underpants save the boys from this frightening fate? Because Tippy Tinkletrousers and his time-traveling hijinks prevented George and Harold from creating Captain Underpants in the first place! Now, having changed the course of human history forever, they'll have to figure out a way to CHANGE IT BACK. Could this be the end for Captain Underpants?!!

Only Captain Underpants can stop Professor Poopypants from reducing the world to the size of a pair of pre-shrunk underpants. This is the fourth story to feature Captain Underpants.