Unit sales of print books fell 8% in the week ended Aug. 7, 2021, compared to a year ago, at outlets that report to NPD BookScan. The biggest decline came in the YA fiction category, due to tough comparisons with last year at this time, when Stephenie Meyer’s Midnight Sun sold about 527,000 copies in its first week. The top YA fiction book in the most recent week was Adam Silvera’s They Both Die at the End, which sold about 16,000 copies. Adult nonfiction sales dropped 15.2% in the week, and here too there were tough comparisons with last year. In the week ended Aug. 8, 2020, Sean Hannity’s Live Free or Die debuted with about 184,000 units sold, while Caste by Isabel Wilkerson sold approximately 78,000 copies in its first week and Mary Trump’s Too Much and Never Enough sold more than 97,000 copies. American Marxism by Mark Levin remained #1 in nonfiction in the most recent week, selling more than 57,000 copies, followed by The Truth About Covid-19 by Joseph Mercola, which sold 21,500 copies. Alexander Vindman’s Here Truth Matters was third on the category list, selling almost 16,000 copies in its first week. Adult fiction sales were up 20.4%, led by Stephen King’s Billy Summers, which sold more than 96,000 copies in its first week. Summers was followed on the adult fiction list by three new graphic novels published by Viz Media: Jujutsu Kaisen, Vol. 11 by Gege Akutami sold almost 32,000 copies, followed by Demon Slayer, Vol. 23 by Koyoharu Gotouge, and Chainsaw Man, Vol. 6 by Tatsuki Fujimoto, which each sold nearly 28,000 copies.