For sale: Several coverless books bundled together with jute twine. They can't be opened or read, but with pages faded and foxed as aficionados call the discoloration that comes with age the books add an antiquarian touch to any home for $29. "Like it or not, books really do harken back to an older time," said Donata Maggipinto, spokeswoman for the Corte Madera-based Restoration Hardware, which has sold out of its first run of antique coverless book bundles introduced this spring.