I’m making the table top bookcase in the new book by M. Pekovich (the one housing his Harry Potter books). It has a shiplap back. The tops and bottoms of the slats are rabbeted and fit into grooves in the top rail and bottom.
The outermost slats are butted and glued against case sides. My question is on the attachment of the inner slats. Is glue involved at all? Should I drive brads through slats into shelf? I’m not sure how “free-floating” the slats are supposed to be.