Barnes & Noble executive Marc Parrish in a presentation at GigaOM's Big Data Conference predicted that e-books would dominate book sales in an absolute sense in two years. He expected the industry to "totally shift" sometime within the period based on a combination of rapid device adoption and usage habits. About 18 million e-readers should be sold this year versus just 900,000 in 2009; 30 percent of US readers look at both digital and paper books, according to Forrester and Gartner research.
