Back in middle school after summer vacation, Greg Heffley and his older brother Rodrick must deal with their parents' misguided attempts to have them bond.

Fourth-grade science whiz Phineas MacGuire is forced to team up with the new boy in class on a science fair project, but the boy's quirky personality causes Phineas to wonder if they have any chance of winning.

High school sophomore Kara Hendricks grows closer to God when Jordan, her best friend since kindergarten, dumps her for the "cool" crowd.

Seventh-graders Sophie, Margaret, Rebecca, and Leigh Ann follow a trail of cryptic clues to locate a rare violin, catch the person sneaking into St. Veronica's School for late-night cleaning and redecorating, and outsmart a conniving classmate.

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

When Sam's mother forgets to pack his lunch, his friends in the first grade come to his rescue.

After high school juniors Spencer, Emily, Hanna, and Aria think they have seen Ali, their missing and presumed dead friend, they pursue clues from a mysterious stalker, trying to find out if she is still alive.

After helping her supposed best friend Veronica found the sixth grade's secret club, the Awesome Kennedy Girls, Robin accidentally gets on her wrong side and discovers how bossy and cruel Veronica really is.

Two friends, one of whom is deaf, help each other when tryouts are held for a seventh-grade production of "Annie."

Spencer, Hanna, Aria, and Emily, friends since seventh grade at the exclusive Rosewood school in Pennsylvania, find their history of telling small, convenient little lies catching up with them when a mysterious person named A begins making threats, hinting that he or she knows what really happened to their murdered friend Alison.