I wrote and excellent book on low level nuclear reactions and physics. It took 20 years to produce. It is not selling. I wrote a stupid app to teach a parrot to talk. I knew how to use the android audio recorder and found this way to use it.
The app is #1 in sales again today. So what have I learned from this, nothing! https://www.amazon.com/gp/bestsellers/mobile-apps/9408731011/ref=pd_zg_hrsr_mas_1_3_last Frank Znidarsic
