Visitors to the U.S. are often shocked to discover that we have only one truly nationwide bookstore chain remaining. That company, Barnes & Noble, has just 700 stores unevenly spread around the country. The past few years, B&N has strayed widely from its literary roots with more and more shelf space devoted not to printed books, but to gifts, gadgets and e-readers. But now the chain is once again promoting itself as the place for books with a neat set of shopping bags that feature the first pages of classic novels, such as Alice in Wonderland, Moby Dick, The Wizard of Oz, and Adventures of Huckleberry Finn.