Mark Danna is a professional word search puzzlemaker and the author of 15 word search books. Since 1991, Danna has written United Media's syndicated newspaper puzzle “Word Gurdy,” and he is the coauthor of 365 Brain Puzzlers, American Mensa's long-running, annual, page-a-day puzzle calendar. Danna was also a staff writer for the TV show Who Wants to Be a Millionaire.