Cory Doctorow talks about how giving away his books helped him sell even more of them. It's an interesting world in which a science fiction author gets an article in Forbes, and even more interesting if more publishers start listening to him. Doctorow freely admits he doesn't know how authors (or hell, any creative people for that matter) will make money in a world in which everyone copies and no one buys books ... but he's right in saying that the answer isn't to turn your back on the net and try to throw as many locks and barriers on your content as humanly possible.