Here is what I mean by meta-fiction: all these books, stories, and bodies of work contain made-up books and bodies of work. Some are based on real books. Some are making fun of real books, a little bit, gently. Some are invented entirely. And one, you can go out and buy. Hint: it’s not Don Quixote.
Lily Meyerin considers some recent examples of metafiction in an essay over at the Ploughshares blog.