How better to learn the Special Theory of Relativity and the General Theory of Relativity than directly from their creator, Albert Einstein himself? In Relativity: The Special and the General Theory, Einstein describes the theories that made him famous, illuminating his case with numerous examples and a smattering of math. Delve into the world of the infinitely small, infinitely large, and lightning fast, and at least scrape the surface of these two great concepts which laid the foundations for atomic, nuclear and quantum physics in the following decades, and made space flight and modern astronomy possible.