I started being an independent physics and mathematics researcher at age 19. After 12 years, I finally gathered a considerable part of my challenging thoughts and ideas in a book entitled The Theory of Density: From the Effect of Pressure on Time Dilation to the Unified Mass-Charge Equation, which was edited by Cynthia Kolb Whitney (Editor of the slightly offbeat journal Galilean Electrodynamics) and published by Nova Science Publishers in late 2017. Now I am working on my second book ...