"Book spirits" refer to the idea that books can hold a certain essence or energy, often attributed to the thoughts and emotions of their authors. This concept suggests that when a reader engages with a book, they are connecting with the spirit of the writer, experiencing their intentions and feelings through the written word. In some cultures, book spirits are thought to be the souls of the stories themselves, living within the pages. This belief emphasizes the importance of literature in preserving ideas and experiences, allowing readers to explore different perspectives and connect with the past through the written word.