Alison Flood guardian.co.uk, Thursday 26 April 2012 Sci-fi author Charlie Stross believes that Tor's decision to make its ebook list DRM-free will benefit readers and retailers alike Tor, the world's biggest science fiction publisher and home to authors including Orson Scott Card, China Mi??ville and Cory Doctorow, has shaken publishing with the news that its entire list of ebooks is to be made di