The mid-century style of the Quark Enterprises 25 Cubby Mid-Century Bookcase is so appealing it will probably be around long enough to reach the middle of the next century, too. This simple and functional bookcase gives you the body and durability you need with a clean-lined, utilitarian style. Each one of the interlocking panels is made from melamine-covered MDF, a material that's strong enough for the job and won't warp, crack, or rot like regular wood. You don't need any tools to put it together; assembly takes only a few minutes of your time. When it's time for these shelves to come down, they disassemble as easily as they went together.