maybe something with Wood vs metal. but the look and idea are sharp. Contemporary window treatments by Antonio Citterio, Patricia Viel & Partners [internal shutter : sheer fabric set into hinged metal frames]
"Two-level library of a Mercer Island home designed by Kelly Wearstler." A small upstairs bedroom was sacrificed to make this, and the brass spiral staircase was custom-made. Probably any book-lover would love this.