The Einstein Theory of Relativity, by Lillian R. Lieber. In this book on the Einstein Theory of Relativity the attempt is made to introduce just enough mathematics to HELP and NOT to HINDER the lay reader/ "lay" can of course apply to various domains of knowledge perhaps then we should say: the layman in Relativity. Many "popular" discussions of Relativity, without any mathematics at all, have been written. But we doubt whether even the best of these can possibly give to a novice an adequate idea of what it is all about. What is very clear when expressed in mathematical language sounds "mystical" in ordinary language. On the other hand, there are many discussions, including Einstein's own papers, which are accessible to the experts only. We believe that there is a class of readers who can get very little out of either of these two kinds of discussion readers who know enough about mathematics to follow a simple mathematical presentation of a domain new to them, built from the ground up, with sufficient details to bridge the gaps that exist FOR THEM in both the popular and the expert presentations.

This book is an attempt to satisfy the needs of this kind of reader.