For the five years between 2002 and 2007 (click here for data; opens a PDF), overall trade book sales averaged an annual increase of 2.5 percent. (noshelfrequired.com)
In 2012, e-book sales accounted for 20 % of trade book sales revenue. (articles.latimes.com)
Ebooks as a percentage of overall trade book sales in the US should hit 45 %, up from what I'm estimating will... Continue reading → (bookmarketingbestsellers.com)