When Miss Know-It-All's inbox overflows with pleas for guidance, Nikki Maxwell, the school newspaper advice columnist, turns to her best friends for help.

Nikki tries to be a pet sitter, but realizes it's harder work than she thought.

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.

As Nikki plans how she's going to spend her summer, things get more complicated after she starts hanging out with a visiting student.

Nikki's diary describes a frightful Halloween, on which she helps with her sister's ballet class party at the same time she is Brandon's date for their middle school Halloween dance, where she has promised to spend the evening with her two best friends.

Nikki Maxwell is determined to help out her crush Brandon save an animal shelter. So Nikki and her friends Chloe and Zoey enter an ice skating competition to help raise money for the shelter, but (big surprise) Mackenzie has to stick her nose in and cause trouble.

It's Nikki's birthday, and it is up to her whether it is a blast or a bust.

Questioning his resolve to attend public school after being homeschooled when he is targeted by a bully, Max aspires to become like his favorite comic book heroes and finds an unexpected opportunity to be the hero his middle school needs.

Middle-school drama queen Nikki Maxwell worries about asking a boy to her school's "sweetheart dance."