Relativity for the Million Author:Martin Gardner AKA: "The Relativity Explosion", "Relativity Simply Explained". — From Amazon: — One of the clearest, most entertaining introductions to the subject ever written offers lucid explanations of not only the special and general theories of relativity, but also of the Michelson-Morley experiment, gravity, and spacetime, Mach's principle, the twin parad... more »ox, models of the universe and other topics. 100 illustrations.« less