Relativity: The Special And General Theory. by Einstein, Albert - 1920

New York: Henry Holt and Company, 1920. First edition of Einstein's ground-breaking work. Octavo, original blue cloth. Signed by the author on the half-title page, "A. Einstein 50." In near fine condition with light rubbing and wear. Translated by Robert Lawson. Housed in a custom half morocco clamshell box. Scarce. The only signed example of this cornerstone work to have appeared at auction. It can hardly be disputed that the theories put forth in this book are among the most important in the history of modern science. "The imprint of Einstein's work on the different areas of physical science is so large and varied," writes Gerald Holton in a recent assessment, "that a scientist who tries to trace it would be hard put to know where to start" (Simmons, The Scientific 100).