The Invisible Writing by Arthur Koestler
1954. First Printing. 431 pages. No dust jacket. Grey and black cloth. Contains black and white plates throughout. Pages remain bright and clear with minimal tanning and foxing. Scuffing to front pastedown. Pencil inscription to front free endpaper. Light creasing to gutter. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Some crushing to spine ends. Noticeable sunning to spine and edges. Small marks to boards.