Einstein's masterwork : 1915 and the General Theory of Relativity
"One of the world's most celebrated science writers reveals the origins of Einstein's General Theory. In 1915, Albert Einstein presented his masterwork to the Prussian Academy of Sciences--a theory of gravity, matter, space, and time: the General Theory of Relativity. Einstein himself said it was "the most valuable theory of my life," and a work "of incomparable beauty." The General Theory describes the evolution of the universe, reveals the exis...