New York, N.Y.: Ace Books, 1964. First Edition. 12mo pocketbook, 192 pages; 17 cm Very good(++) to about near fine with minor wear. Personal owner name to front free endpaper. . Paperback.
"CIA agent Chuck Rittersdorf and his psychiatrist wife, Mary, find themselves on a distant moon that has been taken over by patients from a psychiatric hospital." // Series: Ace F-309
