“We’re seeing short-form content becoming more popular in the digital marketplace, and HarperTeen Impulse allows us to experiment with new concepts and deliver content quickly,” HarperCollins Children’s Books president and publisher Susan Katz told the New York Times, which first reported the news.

The NYT reports that HarperCollins will release up to four titles on the first Tuesday of every month, starting December 4. Upcoming titles include short stories by bestselling YA authors Walter Dean Myers and Sarah Mlynowski and novellas by Courtney Allison Moulton and Scott Westerfeld.

Teenagers have been slower than other age groups to switch to ebooks, and children’s and YA ebook sales have increased in part because adults are buying ebooks like The Hunger Games. But the low prices and shorter lengths of HarperTeen Impulse’s titles could induce teens to give them a try. HarperCollins launched Epic Reads, an online community for teens, in June. One section of the site features “epic deals,” full-length ebooks at $2.99.