http://www.nytimes.com/2011/08/09/bo...e-2008.html?hp
"The publishing industry has expanded in the past three years as Americans increasingly turned to e-books and juvenile and adult fiction... In 2010 publishers generated net revenue of $27.9 billion, a 5.6 percent increase over 2008. Publishers sold 2.57 billion books in all formats in 2010, a 4.1 percent increase since 2008."