How adorable is this? The Hold On Tight shelf by Colleen & Eric features two built-in bookends – one fixed and one moving. The idea that is both cute and sensible. Designers elaborate: “Your books are no longer in danger of toppling over. Over-sized wing-nut allows bookend to slide into place and be secured wherever it’s needed.” The shelf comes in beech, walnut and oak, covered with water based stain and all natural shellac finish. The aluminum cube and wing-nut are powder-coated.