The library was accessible to anyone and contained everything from ship's logs and diaries to scientific papers and metallurgical formulas and everything in between.
Plays, historical accounts, songs, astronomical calculations, star charts, maps, architectural values and so on.
It would be like losing the internet today - a thousand years from now, some of the content may survive because some of the net's content was copied for whatever reason and over time, the copied content will fall by the wayside because of war, natural disaster or personal indifference (person dies, next if kin tosses material in trash, etc.) until tiny fragments remain.