This infographic shows the sales of bookstores in the US during the first half of the year from 2009 to 2016. After a number of years in decline, sales finally started to pick up again in 2015 when there was a 1.9 percent increase on the previous year. Far from a flash in the pan, sales increased again in H1 2016 by an impressive 6.1 percent.
Source: Statista
https://www.statista.com/chart/5532/are-us-bookstores-finally-turning-the-page