What's up with the curtain in the book store? Actually I probably shouldn't be asking that.
Also I'm all paranoid now cuz I keep getting anxious that I'm fucking up conversations by not asking the right questions. Plus I'm like two hours in an already a communist, fucking game knows me too well.
Relax, enjoy the show. There's no optimal conversation path through the game. It may even be the case for you that it's better at times not to say something, even if you're curious.
The curtain leads somewhere.