<< In the United States and Britain, sales of e-books represent between a quarter and a third of the consumer book market and, by 2018, will edge out printed and audio books as the most lucrative segment, according to projections by the consulting firm PricewaterhouseCoopers. >>
The full article, “In Europe, Slower
Growth for e-Books,” appeared in the New York Times: http://www.nytimes.com/2014/11/13/arts/international/in-europe-slower-growth-for-e-books.html?_r=0