[netman21]

I feel this. I write non-fiction in the tech industry. I start every project estimating the potential number of readers. My second book is the only one written for a particular profession. I calculated there were at least 20,000 people in the profession. Over 13 years it has sold about 2,000 copies. I have also written the only history of the IT security industry. I update it every year. It too only sells 2,000 copies per edition. Definitely not a way to make a living.