Discovering a tattered letter that says she is to open it only in the event of her husband's death, Cecelia is unable to resist reading the letter and discovers a secret that shatters her life and the lives of two other women.

Sixteen-year-old Min Green writes a letter to Ed Slaterton in which she breaks up with him, documenting their relationship and how items in the accompanying box, from bottle caps to a cookbook, foretell the end.

Feeling unfulfilled in her romantic life in spite of a promising career in the L.A. film scene, talented set designer Emi discovers a mysterious letter at an estate sale that prompts her investigation into a movie icon's hidden life.

When seventeen-year-old Ginny receives a packet of mysterious envelopes from her favorite aunt, she leaves New Jersey to criss-cross Europe on a sort of scavenger hunt that transforms her life.

Returning to her childhood home after nearly two decades and reeling from upheavals in her world, Noel Post inherits her father's bookstore and begins receiving letters from an anonymous source, each one containing thoughts and lessons about her life and her future, and as she begins to reacquaint herself with the bookstore and the people she left behind, Noel starts to unravel the reality of her painful childhood and the truth about her family.

Two girls from very different backgrounds become best friends in the turbulent '60s, but their circumstances and choices--and their mistakes--take them in opposite directions. Lesley stays in their hometown. She marries young, living a life defined by the demands of small children, never enough money, and an unfaithful husband. Jill lives those years on a college campus shaken by the Vietnam War, and then as an idealistic young lawyer in New York...

Amos Abernathy lives for history. Literally. He’s been a historical reenactor nearly all his life. But when a cute new volunteer arrives at his Living History Park, Amos finds himself wondering if there’s something missing from history: someone like the two of them. Amos is sure there must have been LGBTQ+ people in nineteenth-century Illinois. His search turns up a Civil War soldier who might have identified as a trans man if he’d lived today....

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.

Although Juno, a Korean American boy, cannot read the letter he receives from his grandmother in Seoul, he understands what it means from the photograph and dried flower that are enclosed and decides to send a similar letter back to her.

Through a series of letters, Simon, a grumpy and jealous cat, informs Baxter, his boy's new dog, that he is not welcome and should leave at once.