The story about eleven-year old Harriet, who is a spy, plans to be a writer, and keeps a secret notebook filled with thoughts and notes on her school mates and people she observes on her after-school "spy route." However, when her classmates find and read her notebook, their anger and retaliation, and Harriet's unexpected responses, explode in a hilarious and often touching manner.

After studying really hard for a math test, Claudia is accused of copying off of someone else's test. The Babysitters come to her aid.

There are some pretty weird grown-ups living in Bailey City, but could the new band teacher really teach a skeleton to play the tuba? The Bailey School kids are going to find out!

The part of third grade Ellen Tebbits likes most is having Austine Allen for her best friend.

Tracy's long friendship with unconventional Kelly is strained when Tracy's new friends put pressure on her to choose between them.

Derek thinks he'd prefer to be a dog until he starts school and finds out it's even more fun being a boy.

Stanley is excited about Crazy Hair Day at his school, until he discovers that he has gotten the date wrong.

A small incident during recess threatens to turn nine-year-old Marvin into the outcast of his third-grade class.

Betsy, Tacy and Tib have good times and quarrels during their sophomore year in high school.

Jill goes along with the rest of the fifth-grade class in tormenting a classmate and then finds out what it's like when she, too, becomes a target.