The center shelf is supported on either end by notches in the legs and spindles. There are also several screws from the back. The finish is actually Homer Formby Tung Oil which, oddly enough, actually isn’t tung oil but a wiping varnish. It can be a pain to apply because it takes multiple coats to build a sufficient finish, but I like the final outcome. Wax would be appropriate for the top, but I’m not sure about the shelves. I don’t know how the wax finish would handle books sliding back and forth.
Artisan Woodworks of Texas- www.awwtx.com