Build the bookcase first. It's pretty simple. Put it together with the staircase sides. Keep in mind to keep the treads flush on the right side. Just like the first floor staircase, the flush side goes up against the wall. Dry fit the staircase sides first to your dollhouse so you don’t make a mistake and confuse the side that goes flush. This is very important. If you don’t keep the right side flush, the staircase will not fit. Dry fit until it's clear in your mind the side you need to keep flush.
After the staircase was done, I put it aside because I have to prime the walls of the shell I built the other day. Don't stain or paint your staircases until they are thoroughly dry. I suggest you wait overnight. Stain and paint can loosen the glue if it's not completely dry.
