Barnes & Noble today unveiled a smaller, relatively inexpensive Nook e-reader.
Like the original Nook, the $139 "Simple Touch Reader" has a black-and-white screen for reading books. Unlike it, though, it's got a touch screen.
While that option starts nudging the e-reader closer to the tablet market, dominated at present by Apple's iPad, the new Nook doesn't have tablets' characteristic ability to run apps, something the company's Nook Color can handle. The Nook Color has a touch screen.