books.google.de - According to Einstein himself, this book is intended "to give an exact insight into the theory of Relativity to those readers who, from a general scientific and philosophical point of view, are interested in the theory, but who are not conversant with the mathematical apparatus of theoretical physics."...http://books.google.de/books/about/Relativity.html?hl=de&id=AByWezmWXJoC&utm_source=gb-gplus-shareRelativity