Put the shelves and posts together to see if everything fits correctly, and when you have the pieces situated and the unit is square, extend the pilot holes into the ends of the shelves. Use #6 1-1/2" Square-X Screws (pieces 6) to secure this assembly. Now add the slats to the shelves. Glue the screw hole plugs into the counterbores then, when the glue dries, trim and sand tile plugs flush with the posts and slats. Now you’re ready to do the finishing.

Given the light use this bookshelf will receive, Danish oil seems like the right choice of finish, and it will allow the cherry to darken naturally. It's also one of the easiest ways to finish a piece with so many narrow spaces and slats. Let the finish cure for a few days, then the bookcase should be ready to go. If you do your finishing carefully, you may find that it's tough to cover your beautiful shelves with books. During the course of the first year I do recommend shifting the books and knickknacks frequently as the wood color deepens. This will ensure an even finish as the patina develops.