Greg Heffley recounts his daily experiences during summer vacation as he tries to live out his ultimate fantasy of spending the days indoors playing video games with no responsibilities and no rules, despite his mother's attempts to pack the summer with outdoor activities and family fun.

Springtime brings crazy adventures to Nikki and her friends Chloe, Zoey, and Brandon.

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

When the Thea sisters discover a diary belonging to an old explorer that tells the legend of seven mysterious treasures, the girls find themselves on a search for the first treasure using the explorer's diary as a guide.

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.

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.

"After a disastrous field day competition at school, Greg decides that when it comes to his athletic career, he's officially retired. But after his mom urges him to give sports one more chance, he reluctantly agrees to sign up for basketball. Tryouts are a mess, and Greg is sure he won't make the cut. But he unexpectedly lands a spot on the worst team. As Greg and his new teammates start the season, their chances of winning even a single game look...

Nikki is in the spotlight. A reality TV crew will follow her and her friends for the whole month of March as they record their hit song together. But will the excitement also cause unexpected problems, now that cameras are everywhere Nikki and her friends go?

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.

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.