Viral Internet marketing strategies appear to have been overlooked as a topic of interest when it comes to published eBooks. If you have any extended treatment on it, it is probably something you paid a good sum for, or maybe came buried in some marketing course. Other than a few “6 principles” and “10 strategies” articles, a quick check of the first 50 listings on Google turned up only 2 eBooks on the topic. So you have something for free that is pretty rare, even if you were willing to pay for it!