Quotes from other fictional books being used as an Epigraph or part of the frame of the story. They are not part of the text proper. These quotes are always apposite, and often provide painless Exposition, rather than relying on As You Know -- style conversations. In Speculative Fiction, fictitious encylopedias are often used, such as Asimov's Encyclopedia Galactica. Journal entries or biographies can also be used. Can be part of a Scrapbook Story. In Video Games these tend to be more-or-less random and not immediately relevant to the story and can be used give the player something to read on a Loading Screen.