The play "The King in Yellow"
In Chambers' book "The King in Yellow", the central element was the play of the same name. It seems to me it would be interesting to find small "excerpts" from it, as if describing what had happened or what was about to happen in the game.
I generally think we should add more small secrets. They improve immersion and are a nice reward for players who take the time to explore every nook and cranny.
