On the Theory of Relativity

This collection, intended for a wider audience, contains new publications of three articles by Einstein: "What is the Theory of Relativity, " "A Brief Outline of the Development of the Theory of Relativity, " "The Problem of Space, Ether and the Field in Physics" and two small books: A. Einstein, Sidelights on Relativity, and H. A. Lorentz, The Einstein Theory of Relativity.