Are the drinking game rules in the Brewery Shop books? Can I read them to my pet, or are they just a piece of paper?

they are books. You can read them to your pet(s).

Thank you! Didn't want to dump sP into it if they weren't.

you are welcome. Just about everything in these shops will resell because not everyone will have enough time to wait or all the immediate capital to buy all they want, so restocking mistakes here can be recovered.