In a set of very fast-moving overview slides, Nielsen Book global managing director Jonathan Stolper said the company is estimating that ebook unit sales for 2016 for the twenty plus companies that provide their data will show a decline of 16 percent, with unit sales of 177 million. (So far PubTrack Digital has compiled and published data only through September 2016.) That estimate for 2016 compares to 210 million units in 2015, 234 million units in 2014, 242 million units in 2013, closer to the 165 million units recorded in 2012. eBook volumes have fallen enough that hardcovers regained their place as […]