Silverberg, Robert/James E. Gunn - The 13th Immortal/This Fortress World.

ACE Books, 1957. Later Printing. Mass Market Paperback. A solidly bound mass market paperback. Shows signs of being previously read including 1 or more of the following: creased spine, dog ears, creases to cover, edge & corner wear, light staining or discoloration, fading or discolored page edges.. Very Good with No dust jacket as issued.

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