John Forster was a close friend and mentor to Charles Dickens. He helped Dickens with his writing and publishing, and he also wrote a biography of Dickens after his death.

Ernest Hemingway and F. Scott Fitzgerald were close friends and rivals. They often wrote about each other in their work, and they had a significant influence on each other's writing.

Christopher Tolkien was the literary executor of his father, J.R.R. Tolkien. He edited and published many of his father's works, including The Silmarillion and The History of Middle-earth.

Vita Sackville-West was a close friend and colleague of Virginia Woolf. They often wrote about each other in their work, and they had a significant influence on each other's writing.

Richard Wright was a mentor to James Baldwin. He helped Baldwin with his writing and publishing, and he also wrote a preface to Baldwin's first novel, Go Tell It on the Mountain.

Anne Sexton was a close friend of Sylvia Plath. They often wrote about each other in their work, and they had a significant influence on each other's writing.

Mary Hemingway was the literary executor of her husband, Ernest Hemingway. She edited and published many of his works, including A Moveable Feast and Islands in the Stream.

Vikram Seth is a close friend and colleague of Salman Rushdie. They often write about each other in their work, and they have a significant influence on each other's writing.

James Baldwin was a mentor to Toni Morrison. He helped Morrison with her writing and publishing, and he also wrote a preface to Morrison's first novel, The Bluest Eye.

Mario Vargas Llosa is a close friend of Gabriel García Márquez. They often write about each other in their work, and they have a significant influence on each other's writing.

Jerome Klinkowitz was the literary executor of Kurt Vonnegut. He edited and published many of Vonnegut's works, including Palm Sunday and Timequake.

Alice Munro is a close friend and colleague of Margaret Atwood. They often write about each other in their work, and they have a significant influence on each other's writing.

Oscar Hijuelos was a mentor to Junot Díaz. He helped Díaz with his writing and publishing, and he also wrote a preface to Díaz's first novel, Drown.

Banana Yoshimoto is a close friend of Haruki Murakami. They often write about each other in their work, and they have a significant influence on each other's writing.

Oprah Winfrey was the literary executor of Maya Angelou. She edited and published many of Angelou's works, including Mom & Me & Mom and Letter to My Daughter.