This is no ordinary bookshelf. Meet Atlas Industries’ handcrafted as4 system, a gorgeous, substantial, and flexible solution for all your shelving needs. Fashioned from walnut, white oak, or maple shelving and heavy cold-rolled steel supports, the systems are solid and stylish (and portable, if you move). The Brooklyn-based fabricator offers options such as floor-based mounting, custom finishes, and pick-and-choose components. The website’s clever Builder Feature allows you to custom configure a system to fit your space and needs. Go to Atlas to view products, or visit the showrooms in New York, San Francisco, and Los Angeles.