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 supercategory, 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.” via www.npd.com