Sales of Print Books End January on High Note By Jim Milliot | Feb 04, 2021 Unit sales of print book rose 19.5% in the week ended January 30, 2021, over the comparable week in 2020 at outlets that report to NPD BookScan. The increase marks the third consecutive week unit sales increased by at least 19% compared to 2020. For the month of January, print unit sales were 21.3% higher than January 2020. As has been the case for most of January, sales were up by double digits in all major categories. The four children’s publishing segments saw the largest gains. Unit sales of young adult fiction increased by 50.6% over a year ago, and young adult nonfiction sales rose 41.2%. In YA fiction, sales of supernatural/horror rose by 113% over the week ended February 1, 2020.