سے طرف کی Bob Minzesheimer and Anthony DeBarros, USA TODAY

Led سے طرف کی Stephenie Meyer's Twilight series, vampires devoured USA TODAY's Best-Selling کتابیں فہرست in 2009.

For the سیکنڈ سال in a row, Meyer swept the سب, سب سے اوپر four spots. No other مصنف — not even J. K. Rowling— has done that in the list's 16-year history.

Meyer's coattails pulled 16 other vampire titles onto the فہرست of the year's 100 most مقبول books.

"Meyer had an unbelievable impact," says Michael Norris, کتابیں analyst for Simba Information, a market-research firm. He wonders what publishers will do when what he calls " 'the vampire industrial average' falls. Every cycle has an end."

But for now, Meyer — who has also benefited from Twilight movie adaptations, with مزید to come — has turned "the YA (young adult) category into the PG-13 of books," he says. "She's not just read سے طرف کی tweens and teens, but سے طرف کی a lot of 30-year-old women."

No matter who's reading them, کتابیں for kids and teens accounted for 29% of sales tracked in 2009 — the highest percentage in the list's history, up from 28% in 2008 and 22% in 2007.