In the spacious living area of a Milan apartment owned by a passionate bibliophile and collector of books on design and art, the centerpiece is the custom-designed "Onda" bookcase by Spazio RT. With its fluid, undulating lines and striking sea-blue finish — a nod to the client’s coastal origins — the bookcase transforms an entire wall into a sculptural, functional installation. More than just storage, "Onda" introduces movement, color, and character to the space, bringing a vibrant and uplifting presence rarely found in Milan’s muted palette.