The Theory of Relativity by Albert Einstein, Sixth Edition 1921, is a rare and collectible book published by Methuen in the United Kingdom. This cloth-bound edition, written in English, delves into the intricate realm of Mathematics and Sciences, making it a sought-after piece for those interested in the works of one of the most renowned physicists in history. With its origins in 1921, this edition offers a unique glimpse into the theoretical advancements of the early 20th century, making it a valuable addition to any antiquarian or collector's library.