
Amber Brown Goes Fourth by Paula Danziger, 1995.

Big changes are happening in the life of Amber Brown. She’s back from her trip to England, during which she got chicken pox, and she’s about to start fourth grade. However, her best friend, Justin, has moved away, so she’s going to have to face the start of the new school year without him. Amber worries about whether she’ll be able to find a new best friend. Meanwhile, she’s also still adjusting to her parents’ divorce and her father’s move to Paris, France, and her mother has recently started dating a man named Max. Amber’s mother wants Amber to meet Max, but Amber doesn’t feel ready for that and is still quietly hoping that maybe her father will come back and her parents will reconcile.
Amber’s friend problems seem be solved when Brandi sits next to her in their new class. Brandi has changed since the last school year and is no longer best friends with snobby Hannah. Being friends with Brandi also forces Amber to make some changes. Brandi is quick to tell her on the first day that she isn’t Justin and that Amber can’t expect her to do the things that Justin would have done. Brandi is less excited about being friends with Amber than Amber is about making friends with her.
Amber worries that she doesn’t know how to make friends and especially that she doesn’t know how to make a best friend. She and Justin got to know each other when they were little kids, and Amber didn’t even have to try to make him her friend. However, that turns out to be the key to making friends with Brandi – not trying so hard and letting their friendship develop naturally.
When Amber and Brandi both have to go to the school’s afterschool program because their mothers work, they get to know each other better. Brandi hasn’t actually lived in Amber’s town for very long, having moved there to only about a year before, and when she moved, she also left behind her best friend and had trouble making a new one. When Brandi joined Amber’s class the year before, almost everyone already had a best friend and didn’t seem interested in making time for a new one, which is why she tried being friends with nasty Hannah. However, Hannah turns out to be mean to everyone, even the person trying to be her best friend, which is why Brandi stopped trying to be Hannah’s friend. Brandi has actually wanted to be friends with Amber for some time, but Amber was always too occupied with Justin, and after Justin left, Brandi was afraid that Amber was just looking for a Justin replacement and wouldn’t like her for who she really is. Amber tells her that she really does like her for being Brandi.

Amber comes to realize that it’s actually a good thing that Brandi isn’t exactly like Justin. She still keeps in touch with Justin by mail, but it’s also fun doing things with Brandi that she would never have done with Justin. Brandi teaches Amber to blow bubble gum bubbles with her nose. Because Brandi is a girl, Amber and Brandi can also do girl things together, like braiding each other’s hair. Brandi also likes to read more than Justin does, and the girls start talking about books with each other. Amber learns that not all changes are bad or difficult and that letting new people into her life brings interesting variety.
By the end of the book, she also comes to understand more about why her mother values her new relationship with Max. Justin’s mother was Amber’s mother’s best friend, and when Justin’s family moved away, Amber’s mother lost her best friend, too. That, combined with her loneliness since her divorce, led Amber’s mother to seek out new relationships, which is how she met Max and became fond of him. Max is apparently a nice man, and he even goes to the trouble of seeking out a particular mermaid toy for Amber because Amber’s mother told him that Amber really wanted one. At the end of the book, Amber still isn’t sure that she’s ready to meet Max because she feels like she needs some time to adjust to the other changes in her life first, but she begins to feel a little more open to the idea of change and letting new people into her life.
The book is very realistic about the gradual changes that Amber goes through as she starts fourth grade and learns how to make a new friend. Not everything in her life is completely resolved, like her feelings about her parents’ divorce and her mother’s new boyfriend, but Amber is making progress and growing up a little.
The book is available to borrow and read online through Internet Archive.

Mystery at Camp Triumph by Mary Blount Christian, 1986.