From the Nielsen Newswire Blog:
… sales of traditional print books increased almost 3%, while sales of e-books dipped. As a result, e-books’ share of the total market slipped from 27% in 2014 to 24% last year. That said, however, certain genres maintained a larger share in the digital realm than others, including Romance and Thrillers.
…e-book consumption via smartphone grew from 7.6% in 2014 to 14.3% in 2015…
In looking at category trends, non-fiction was the highlight of 2015, with 12% growth in children’s non-fiction and 7% growth in adult non-fiction.
From USA Today:
BookScan tracked total print book sales of 653 million units last year…
In other trends, non-fiction grew, with a 12 percent gain in children’s books and a 7 percent gain in adult books.
And as for those stress-reducing coloring books for grownups: An estimated 12 million copies sold in 2015, compared with 1 million in 2014.