A loss of 10 % or even 20 % of print sales when the print run is over 10,000 isn't catastrophic, especially if ebook revenues bring in some of that lost revenue. (eoinpurcellsblog.com)
The increase is so dramatic that coloring books alone can account for the increase in print sales in 2015. (iwritermagazine.com)
The manga publishing industry has firmly relied on print sales in order to generate the their revenue, but digital is starting to take off in a big way. (goodereader.com)