Unbound. Autograph Letter Signed. Written inside a UNSECO Christmas card measuring approximately 8¾" x 6". Card is creased, foredge with a bit of nicking and faint staining, very good. K. C. Constantine discloses his real name to a reviewer and an author of books on detective novels, Robin Winks: "Now that there are two DD's, it's time you know my name and how to find me. Bill Goodman has suggested that a writer ought to be as confident of his editor's trust as a thief is of his lawyer's. After much thought, I am convinced Goodman is right. I am Carl Constantine Kosak... ." He provides a bit of information about himself and invites Winks to visit the next time he's in the neighborhood: "...please call. My wife and I will direct you to our house, where you are welcome to talk, eat, drink, and sleep." The pseudonymous Constantine adds a postscript: "Please don't leave this card laying around. It isn't meant for anyone else." An important letter by the publicly reclusive Constantine, creator of the Mario Balzic mystery series. At the time this letter was written, his identity was not known to readers.