E-books are gaining sales and credibility: The New York Times will add two e-book bestseller lists, fiction and nonfiction, beginning next year. The company has been working on a system to track and verify sales for two years, using weekly data from publishers, bookstores, and online retailers. “It was clear that e-books were taking a greater and greater share of total sales,” says an editor; sales in the first nine months of 2010 were up almost 190% from the same period of 2009, and are expected to climb to 25% of total trade sales within the next few years.
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