I asked a copy of Good Omens how it felt about being used for divination and got:
“Yes”, I agreed, “that’s exactly what I mean. So are you up for it?”
“That’s got to be worth something, hasn’t it?”
“Ha! Okay, any messages from the Powers that I haven’t picked up yet?”
“Okay, well do you have anything to say to me?”
Right then, Good Omens is just about perfect for bibliomancy, if only you have an actual question to ask!