Bookshelves often seem to burst. You always try to squeeze in another book into the last gap which is far too narrow. This shelf gives in to force and makes space for more books by literally bursting.
A hidden board stretches between the split halves and widens the usable surface. The more books you add to the shelf, the wider it opens. The classical rectangular shape turns into a V-shaped outline. [#]
[per la libreria inValid Platzhalter basta spingere. Grazie a Dario per la segnalazione]