Doubleday. Dark blue cloth boards with gold lettering. Binding is tight and square. Signed by the author on the first free page. Stated first edition. Pages are clean throughout. The dust jacket has been price clipped and has some soiling and edge wear. An imaginative book combining the unseen with the seen and the phenomenal with reality. . Very Good. Hardcover. 1st Edition. 1968. Doubleday hardcover