By the way, random selection is one of the few methods to guarantee a fair and representatative sample.
In case of a library I'd want at least part of the catalog represent media of the times is was created, because science also uses that.
One reason archaelogy in Pompei is valuable is that everyrhing - including pornograhic graffiti and slander was preserved, giving us a different perspective into those times than books by medieval historians.
Of course, I'd also want - in another part of the catalog - books/media by manually selected scientists, artists, historians.
Ja ich weiß wo ich bin, aber:
https://de.m.wikipedia.org/wiki/TV-B-Gone