Bringing more shelves and more style. The Branch Shelving Unit Add-On from Gus Modern lets you increase the size of the Branch Shelving Unit as it connects to it as a modular piece, giving you more places to store books, photographs, and more. With a mid-century style and minimalist sensibilities, this Spartan shelving system will look good in your living room or office. Each shelf is made out of solid wood with bullnose edge detailing, and triangle-shaped brackets provide a touch of accenting style.