Matt Gaffney has written over 4,000 crossword puzzles for publications such as the New York Times, Washington Post, Wall Street Journal, Slate, Billboard, and the Onion. He's the author of seven books of crosswords as well as the 2006 narrative book Gridlock: Crossword Puzzles and the Mad Geniuses Who Create Them. He runs a weekly contest at http://crosswordcontest.blogspot.com/.