Penguin has divulged their 2011 sales today and the company has experienced tremendous growth in the digital department. eBook sales accounted for over 12% of the companies yearly sales and made them around 152 million dollars. Although sales for digital content seems to be increasing every year it is still a drop in bucket for their print business. During the course of 2011 … [Read more...] about Penguin sees eBook growth increase by 106% in 2011