I'm looking for a dystopian sci-fi story where something (probably nano-machines) makes the ink in books disappear; thus depriving humanity of its history, knowledge, and culture. This prompts a rule that any (newly recovered) books must be read out-loud to a crowd of people.
I think the protagonist is female and that there is a scene where she dreams she's reading to a crowd and that the letters disappear from the page she's reading before she can finish.
It's possible this is just a dream or a scene in another story, or that it's a short-story in a collection.