HEGENBERGER, John. American, b. 1947. Genres: How-to books. Career: Writer of software documentation, film scripts, and advertising copy; arts and entertainment editor of This Week. Military service: U.S. Navy. Publications: Collector's Guide to Comic Books, Chilton, 1990. Collector's Guide to Treasures of the Silver Screen, Chilton, 1991. Address: William Morris Agency, 6487 Ethen Dr., Reynoldsburg, OH 43068, U.S.A.