The Association of American Publishers – BookStats Publishing Formats Highlights: “e-books and other non-physical formats – “The consistent, growing popularity of e-books and apps are a major success story in content formats, even in advance of data for 2011, which is currently tracking high e-format sales. Highlights:

• e-books have grown from 0.6% of the total Trade market share in 2008 to 6.4% in 2010. While that represents a small amount in the total market for formats, it translates to 1274.1% in publisher net sales revenue year-over-year with total net revenue for 2010 at $878 Million.
• Net unit sales growth for e-books was equally impressive, increasing 1039.6% for the same three-year period. In 2010, e-book net units were 114M.
• Beyond the top-level format figures, the explosive growth of e-books is even more visible when considering certain categories. In Adult Fiction, e-books are now 13.6% of the net revenue market share.