Augusta writes letters to her younger sister, Louie, about life in middle school, from tackling a new school building to meeting new people like the assistant principal, the class pet, and the renegade.

When Annie Rossi's father lets her get a dog, she loves spending time with her new pet Leo, especially reading him stories she writes about the people and events she encounters each day.

In a series of letters a student laments the absence of her teacher and daily routine, but she soon realizes there are benefits to mixing things up, and that perhaps having a substitue teacher is not so bad afterall.

When Jupiter notices a planet circling a far star, he enlists the other planets in our solar system to send a letter, but soon there is a disagreement on which, exactly, is the exoplanet.

When its time to say goodbye to a part of her family, a young girl pens a love letter to Bob, the treasured family car that has taken them all over and been there in sad and scary times.

"When Brie was younger, her mama used to surprise her with treasure hunts around their island town. After she died three years ago, these became Brie's favorite memories. Now, on her twelfth birthday, her mama has another surprise: a series of letters leading Brie on one last treasure hunt. The first letter guides Brie to a special place. The next urges her to unlock a secret. And the last letter will change life as she knows it"--

First-grader Mayu finds a mailbox in the forest near her grandparents' house and begins corresponding with a mysterious friend, but can they continue writing and receiving letters when Mayu returns to the city?

"Astronaut Clayton Anderson lived aboard the International Space Station--and while he didn't mail letters home, imagine if he did! These letters are full of weird science, wild facts, and outrageous true stories from life in space. Backmatter includes even more information on space, astronauts, and living among the stars"--

A fifth-grader whose best friends walked away, whose mother is detached, and whose father does unspeakable things, copes with the help of friend Sofie and anonymous letters tied to balloons and released. Includes a list of resources related to abuse, gender, sexuality, and more.

In this story told entirely in letters, Maximus orders a dinosaur egg through the mail, and every time he tries to send it back or refuse additional offers from Eggasaurus Inc., he is in more trouble.