Print book unit sales in the U.S. 2013-2021, by format
In 2021, mass market paperback sales grew by over 20 million from the previous year, with over 249.7 million units sold compared to the 226.3 million sold in 2020. The only format not to have seen sales growth between 2020 and 2021 was mass market paperbacks. Sales dropped by 3.1 percent year over year, and a consistent annual decline can be seen from 2013 onwards.
