J. R. R. Tolkien used frame stories throughout his Middle-earth writings, especially his legendarium, to make the works resemble a genuine mythology written and edited by many hands over a long period of time. He described in detail how his fictional characters wrote their books and transmitted them to others, and showed how later in-universe editors annotated the material.

A frame story is a literary technique that serves as a companion piece to a story within a story, where an introductory or main narrative sets the stage either for a more emphasized second narrative or for a set of shorter stories. The frame story leads readers from a first story into one or more other stories within it. The frame story may also be used to inform readers about aspects of the secondary narrative(s) that may otherwise be hard to understand. This should not be confused with narrative structure. A notable example is The Decameron.