Unit sales of print books fell 3.9% in the week ended July 17, 2021, compared to the similar week in 2020, at outlets that report to NPD BookScan. It was the second week in a row that sales fell after a long string of weekly gains. Adult nonfiction units dropped 9.1% from the week ended July 18, 2020, despite having the top title, Mark Levin’s American Marxism, which sold nearly 330,000 copies in its first week. Marxism easily outsold two books examining the Trump administration: Michael Wolff’s Landslide sold about 25,000 copies in its first week, and Frankly, We Did Win the Election by Michael Bender sold almost 15,000 copies in its first week. A year ago, Mary Trump’s Too Much and Never Enough was #1 on the list, selling almost 339,000 copies, and books on social justice were also selling well. Adult fiction and YA fiction were the two bright spots in the most recent week. Adult fiction sales rose 16.5%, led by new novels: The Cellist by Daniel Silva sold nearly 49,000 copies, and The Adventure Zone by Clint McElroy and Carey Pietsch sold more than 21,000 copies. Sales in YA fiction jumped 34.4% over 2020, led by a familiar sales pattern: strong backlist sales complemented by a few new releases. Adam Silvera’s They Both Die at the End, published in 2018, was #1, selling more than 15,000 copies, while the top frontlist title, Holly Jackson’s A Good Girl’s Guide to Murder, was #3, selling just under 8,000 copies. The juvenile nonfiction segment had one of its biggest declines of the year, with units falling 21.6%.