I'm considering taking a break from my main novel, and self-publishing a middle-grade level book in ebook/kindle format. I know this would be quicker, and if I could pull it off, it would be a good source of side income. However, I do not have any "online presence" to speak of--no blogs, Facebook, Twitter, etc. I frequently hear that this is necessary for "promoting" an ebook. My idea is somewhat random, so it would be difficult to find a marketing technique. Nevertheless, I have also looked at e-book sites that allow you to self publish, particularly NOOK (the Barnes and Noble affiliate). Marketing is not necessary to publish on them, and they advertise that they put your book "on the market" immediately. Still, there is not much detail given on how your new book is advertised, how likely it will come up under searches, etc. So my question is: how realistic do you think this is? Can someone in my situation (no previous publications or networks) expect to succeed at this? Or should I just stick to the conventional way of publishing?