amazon hq

Amazon CEO Jeff Bezos laid out some pretty impressive numbers for its Kindle Singles program during a press conference in Santa Monica, Calif., today.

To date, Amazon has sold 3.5 million Singles, Bezos said. Thirty-five of the titles have even hit the Kindle top 50 charts, proving that the format has attracted a lot of attention from Kindle owners.

Launched last January, Kindle Singles are essays, memoirs, and short stories that are longer than the average magazine article but shorter than the average novel. Priced between $0.99 and $4.99, Singles cost a lot less than the average e-book, which adds to their appeal (and also pushes them up in the Kindle rankings).

“There’s a funny thing about physical media. Short things work — they’re called magazine articles. And long things work – they’re called books,” Bezos said during the event today. Singles has been successful by sliding between the two categories.