Lower cost e-book sales are gaining ground on traditional formats

More affordable e-readers have made e-books more feasible 
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Image attribution: Taylorlurker

Access to free classics, multifunctional tablet computers and cheaper books has helped bolster adult fiction book sales to the number one revenue maker over hardcovers of the same genre per the Association of American Publishers. The U.S. trend toward digital books grew to $2.07 billion in 2011, and for now, is more cost effective than traditional formats.

Complete article link: http://www.helium.com/items/2350582-why-electronic-books-are-becoming-so-popular