Amazon.com description: Product Description: In 1907, Albert Einstein started his ideas about the general theory of relativity. And it took eight more years after this to conceptualize, to mold, and to chisel (so to speak) so the theory could take proper form and come into being. The reason it took eight years to formulate and to produce his general theory of relativity was because the mathematics involved produced some difficulties to iron out. There are two different theories of relativity: general and special. For simplicity’s sake hereinafter in this book, we will call Einstein’s special theory of relativity: Theory S. And we will call Einstein’s general theory of relativity: Theory G. Thus, it took 8 years for Einstein to produce his Theory G. On the other hand, Einstein’s Theory S only required six or eight weeks to create. Einstein’s Theory S was a platform on to which to build higher and upward his Theory G, which is more expansive, and more all encompassing.