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.

Greg Heffley tells about his summer vacation and his attempts to steer clear of trouble when he returns to middle school and tries to keep his older brother Rodrick from telling everyone about Greg's most humiliating experience of the summer.

While trying to find a new best friend after feuding with Rowley, middle-school slacker Greg Heffley is warned by older family members that adolescence is a time to act more responsibly and to think seriously about his future.

Greg Heffley and his family escape to a tropical island resort for some much-needed rest and relaxation, but sun poisoning, stomach troubles, and venemous creatures all threaten their vacation.

On their a cross-country camping trip, Greg Heffley and his family find themselves stranded at an RV park that's not exactly a summertime paradise and when the skies open up and the water starts to rise, the Heffleys wonder if they can save their vacation--or if they're already in too deep.

The pressure's really piling up on Greg Heffley. His mom thinks video games are turning his brain to mush, so she wants her son to put down the controller and explore his creative side. As if that's not scary enough, Halloween's just around the corner and the frights are coming at Greg from every angle. When Greg discovers a bag of gummy worms, it sparks an idea. Can he get his mom off his back by making a movie... and will he become rich and famous...

Middle-schooler Greg Heffley nimbly sidesteps his father's attempts to change Greg's wimpy ways until his father threatens to send him to military school.

"Greg struggles to stay on Santa's 'nice' list while snowed in with the rest of the Heffley family in the days leading up to Christmas"--

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.

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.