So you think you don't have time for online book promotion? According to Quill & Quire, Margaret Atwood does. In fact, Atwood may be one of the few novelists in North America who doesn't have to worry about book promotion opportunities -- and here she is, taking the time and making the effort to engage her readers online, anyway. Good for her.
If Margaret Atwood is tweeting and blogging, and you haven't yet begun, then what are you waiting for? You need benefits of online book promotion more than she does!