Stepped bookshelves help to divide and characterise this house just outside of Paris. We designed the interior for a family of five, who were enamoured with the room-length bookshelf at a friend’s house, where they were staying during the remodelling. We made the element a feature of the home, which we called Bookshelf House. As well as providing a place to display books, the beech wood shelves act as stair bannisters room dividers and general storage within the three-storey property. Rather than flat shelves, we designed the bookcases to look like stacked boxes. The largest unit extends from the first floor to the mezzanine, serving as the main bookshelf in the living room as well as a bannister on one side of the stairs. Its stepped top continues on the mezzanine level, where it serves as a storage cabinet. The main shelf is reflected by a large mirror on the opposite side of the living room, making books a dominant feature of the space from almost any angle.