Liberty Press, 1954. Supplemented and revised edition. With introductory letters by Albert Einstein and Thomas Mann.
Book: Very good. Dust jacket: Good. Jacket has minor chips and tears along edges and at corners. Foldover to front inner flap is frayed. Back cover is tanned and spine cover is sunned. Pages are lightly tanned and unmarked aside from previous owner's signature in blue ink on front endpaper. Boards have minor edgewear. Spine ends are softened. Binding is starting in a couple places.