So, in my previous life I was a network engineer for AT&T. I managed the performance of the toll network for the Eastern U.S. into Canada. What does that have to do with book sales? I think, the probability of having twenty sales of one book in less than two days, and then having no sales for a week is about as unlikely as having ten million telephone calls in an hour and then having ten thousand the next hour. And it's driving me a little crazy trying to figure out why. And, as far as I can tell, there was nothing unusual to drive up sales, or to drive them back down again. I wish I knew what the difference was and then I could do it every day. Any thoughts?