Prosper Buranelli, F. Gregory Hartswick, and Margaret Petherbridgewere the original pioneers of the crossword puzzle book in 1924. Without their contributions, the modern crossword puzzle may not exist. Michelle Arnot's hobby of constructingcrosswords became a livelihood. She constructed her first puzzle for The New York Times and then held a series of jobs in the puzzle field. She wrote What's GNU: A History of theCrosswordfor Vintage (1981), CrosswordPuzzles for Dummies for Wiley (1998), and Four Letter Words: Secrets of ACrosswordInsider for Perigee (2008).