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

When Rafe Khatchadorian enters middle school, he teams up with his best friend, "Leo the Silent," to create a game to make school more fun by trying to break every rule in the school's code of conduct.

Oliver and Nathan, determined to get to the bottom of their new homeroom teacher's fishy behavior, discover Mr. Aidact is actually an AI robot from a secret experimental program.

Griffin Bing is in big trouble when a Super Bowl ring disappears from his middle school's display case, replaced by Griffin's retainer, and the more he and his friends investigate, the worse his situation becomes.

Greg records his sixth-grade experiences in a middle school where he and his best friend, Rowley, undersized weaklings amid boys who need to shave twice daily, hope just to survive, but when Rowley grows more popular, Greg must take drastic measures to save their friendship.

"In this latest misadventure, Nate, the all-time record-holder for detentions, gets to see how the other half lives as he follows his best friend Francis's example and becomes a total neat freak; has Nate totally flipped out?"--

Although Mia feels fairly satisfied with her life, she worries about who should attend parent-teacher night and her failing grade in Spanish.

Seventh-grader Ben, always an outsider, is led into a deep friendship with Halley, who is being treated for cancer, by the special dog he and his adoptive mother take in.

"A girl with social anxiety becomes the secret voice of the advice column in her middle school newspaper"--

Assigned to attend her archnemesis Mackenzie Hollister's new school for the student exchange week program, Nikki is surprised to learn that there are students at the school even meaner than Mackenzie.