Digital is here to stay. According to the Association of American Publishers e-book sales were $90.3 million, growing 202.3% vs February 2010. Downloaded Audiobooks were $6.9M, an increase of 36.7%., overtaking trade paperbacks as the biggest category. For the year to date (January/February 2011 vs January/February 2010), which encompasses this heavy post-holiday buying period, e-Books [...]