EINSTEIN, Albert. Relativity: The Special and General Theory. New York: Henry Holt & Company, 1921. First Edition, third printing (1921 on title page making it the second printing of this edition and the third overall). Condition: Near fine. Dust jacket is very good plus, with a tear on the top edge and minor running on spine tail. Publisher's original blue cloth. Octavo, 168 pages. Relativity: The Special and the General Theory began as a short paper and was eventually published as a book written with the aim of giving '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.'- from the Preface. It is divided into 3 parts, the first dealing with special relativity, the second dealing with general relativity and the third dealing with considerations on the universe as a whole. It is unique both for giving special insight into one of the greatest minds of the 20th century and for providing a remarkably concise explanation of relativity. In very good to near fine condition, with only very slight mottling to cloth cover and very minor foxing to outer bottom page edges. Absolutely clean and tight inside. A lovely copy of this rare and groundbreaking work.