"May I suggest that you flog your product somewhere else?" How specifically have I advertised a product? I have given no details of my product so that's not accurate, what I have done is provide a significantly powerful perspective on the topic of "Modeling" which you are attempting to explicate.  May I suggest you respond to my questions, since I did you the courtesy of spending my own money on your book!  Of course if you don't well...I could ask for a refund I suppose (no biggy).