New York: Henry Holt & Company, 1920.
First American edition, first printing. xiii, , 168 pp. Navy cloth with gilt lettering. Very Good with worn head and foot cloth, a few scuffs and faint stains as well, edge-rubbing, lettering dulled, former owner's name written on front free endpaper. Text free of markings. The groundbreaking first appearance of Einstein's theories for a general American audience. Item #140939674