Via David Lubar's blog, I discovered the iPulp Fiction Library, a website that is attempting to bring back the dime novel (for free!) and that is specifically targeting boys ages 10-up.
It's worth a look* -- and you might want to sign up for their email reminders. Later this year, they're publishing an original story by Kathleen Duey**, author of Skin Hunger. There's no way I'll miss that!
*I warn you, though, the advertisements are pretty obnoxious. They follow you! Yecch.
**I hope it didn't cut into her sequel-writing time. When, oh when, will it appear?