Rowley Jefferson, Greg Heffley's best friend, tells the story of "Roland the Kind" and "Garg the Barbarian" and their quest to vanquish the evil White Warlock.

A tempting boat trip tests an alley-rat's loyalty to her best friend.

In his first journal, middle schooler Rowley Jefferson, Greg Heffley's sidekick, records his experiences and misguided decision to write a biography of Greg, who, in his own mind, is destined to become rich and famous.

Hanna gets angry at her best friend Lizzy and decides that she does not need a best friend anymore.

As the Terrible Two face the end of their time together in Yawnee Valley, they are determined to pull a prank that changes the town forever.

Gossie and Gertie are best friends and everywhere Gossie goes, Gertie goes too--except when she doesn't, and sometimes that's even better.

Cody and Meg were inseparable...
Until they weren’t.
 
When her best friend, Meg, drinks a bottle of industrial-strength cleaner alone in a motel room, Cody is understandably shocked and devastated. She and Meg shared everything—so how was there no warning? But when Cody travels to Meg’s college town to pack up the belongings left behind, she discovers that there’s a lot that Meg never told her....

When a struggling student teacher assigns a group project, seven-year-old Just Grace gets so involved in working with Grace W. and Grace F. that she fails to understand why she and her best friend, Mimi, are drifting apart.

Relates, in rhyming verse, how fate brought two cat best friends together.

Twelve-year-old Suzy Swanson wades through her intense grief over the loss of her best friend by investigating the rare jellyfish she is convinced was responsible for her friend's death.