The ebook “war” is a race to the bottom, apparently, with Barnes & Noble trying to out-do Amazon on DRM stupidity. A reader emailed B&N customer service to point out that their “free books” offer consists of 5 public domain titles that are no longer protected under copyright, yet are still locked down with digital rights management (DRM). Their response? “For copyright protection purposes, these files are encrypted and cannot be converted or printed.”