By PW Staff | Feb 19, 2021 For the week ended Feb. 13, 2021, unit sales of print books increased 21.3% over the week ended Feb. 15, 2020, at outlets that report to NPD BookScan. It was the second consecutive week that unit sales rose by more than 20% over the comparable week last year. The increase was accomplished without the benefit of a big new hit and once again reflected strength across all major categories as well as big gains for backlist titles. The YA categories had the strongest gains, with nonfiction unit sales jumping 71.7% and fiction up 49.3% over 2020. Two anti-racist books— Stamped by Jason Reynolds and This Book Is Anti-racist by Tiffany Jewell—led the increase in YA nonfiction.