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." He is the coauthor of 365 Brain Puzzlers, American Mensa's long-running, annual, page-a-day puzzle calendar, and was also a staff writer for Who Wants to Be a Millionaire. He is also the author of SCATTERGORIES Word Search Puzzles (9781402759772) and Word Searches (9781402746673).