When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

When a third grade classmate gets her picture in the paper for winning a spelling bee, Judy is determined to find a way to become famous herself.

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.

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.

With her birthday coming up, Jessica hopes that, just maybe, her present will be a real-live potbellied pig. Jessica can hardly wait for her party with Judy Moody and all their friends. But Judy Moody is acting like a pig-head, and Jessica UN-invites her from the party. To make matters worse, Jessica has snooped around the house and has found zero sign of a pig present. Could her birthday be any more of a disaster?

A class visit to the Gross-Me-Out exhibit at the science museum inspires Stink Moody to create a variety of terrible smells to put on the sneakers he plans to enter in the World's Worst Super-Stinky Sneaker contest.

Stink Moody, friends Webster and Sophie, and Mrs. Birdwistle visit tourist attractions in Virginia as they try to give away 101 guinea pigs rescued from a laboratory, although Stink is very reluctant to give away his favorite, Astro.

After second-grader Stink gets an unsatisfactory grade in physical education, his parents tell him he must play a sport and so he masters thumb wrestling, as seen on a sports channel.

Determined to help her sick pet Venus flytrap, Judy Moody enlists the aid of an unruly toad and a mind-reading cat to help her find a cure.

Remembering the countless ways her mother's previous birthdays have been ruined, Judy Moody wants to get things right this time around and tries to organize the perfect birthday, complete with a parsnip and avocado cake.