After a slow start, U.S. print book sales rose 8.2 percent in 2020
Print book sales in the United States had their best year since 2010. Growth occurred across every major super category, including adult non-fiction, adult fiction, juvenile, and teen categories. Unit-sales volume in 2020 rose 8.2 percent, year over year, to reach 751 million units, according to The NPD Group.