Sales of adult books fell 2.7% in 2019 compared to 2018, while sales in the children/young adult segment rose 6.8%, according to AAP's StatShot program. Overall, for the 1,361 publishers who supplied data to AAP, sales rose 1.8% in the year to $14.7 billion.

The K-12 instructional materials segment had by far the best year among the major publishing segments, with sales up 24.0% from reporting publishers. The other major educational segment, higher educational course materials, saw sales decline 10.7%. The religious press category managed to eke out a sales increase in the year, with sales up 1% over 2018.

Sales of professional books dropped 1.8%. The university press category also had a decline, with sales off 4%, according to StatShot.

Although retail bookstore sales were generally soft in December--the U.S. Census Bureau reported that sales were down 7.5% in the month--publishers of adult books reporting to StatShot saw a 3.5% sales increase over December 2018. The children/ya segment saw sales jump 22.6%.

For the full year, sales of all print formats were down in the adult book segment, with mass market paperback posting the biggest decline. In that category sales dropped 14.7% compared to 2018. Hardcover sales declined 7.8%, and trade paperback sales slipped 1.2%.

Downloadable audio was the only bright spot in the adult segment, with sales up 23.2% over 2018 for publishers that report to StatShot. Digital audio accounted for 9.9% of adult book sales in 2019, up from 7.8% in 2018. E-book sales fell 4.3% at publishers who report to StatShot. .

In the children/ya category, all print segments had increases over 2018: paperback sales rose 10.1% and hardcover and board book sales rose 3.9% for both formats.