Five-year old Luna doesn't want to go to school, but when her parents assure her that she will have a wonderful time playing and learning, she decides to give it a try.

Six-year-old Junie B.'s penchant for spying on people and her curiosity about the private life of her teacher get her in trouble in kindergarten.

Judy is excited about becoming a doctor, especially when Class 3T starts a new unit on the human body, but she learns more about being a patient when she catches tonsillitis from her little brother, Stink.

Twelve-year-old Greg, who has always been good at moneymaking projects, is surprised to find himself teaming up with his lifelong rival, Maura, to create a series of comic books to sell at school.

"English just feels wrong to Isabel. She prefers her native Spanish. As she prepares for a new school, she knows she's going to have to learn. Her first day is uncomfortable, until she employs her crayons and discovers there's more than one way to communicate with new friends"--

After hearing from a classmate at kindergarten that people have monsters under their beds, Junie B. Jones is afraid to go to sleep that night.

When Judy Moody gets serious about protecting the environment, her little brother Stink thinks she is overdoing it, but she manages to inspire her third grade class to undertake an award-winning, environment-saving project. En clase de ciencias, Judy se entera de que se están destruyendo los bosques tropicales, de que hay muchos animales en peligro de extinción y de que el planeta entero tiene serios problemas ambientales. Entonces Judy lanza una...

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.

When scholarship student Nikki Maxwell, whose father is the school exterminator, decides to enter the talent show at her expensive private school, her nemesis MacKenzie threatens to reveal Nikki's status to the rest of the school.

Jorge y Berto han creado un monstruo, la Supermujer Macroelástica. Con la ayuda de sus horripilantes robots y su horrendo moño, la Supermujer está dispuesta a apoderarse del mundo y administrarle un golpe a todo el que se interponga en su camino-- incluido el Capitán Calzoncillos. 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...