Ever since selling her first puzzle to the New York Times more than 30 years ago, Michelle Arnot has made herself at home in the world of crosswords as a puzzle creator, editor, publisher, author, and instructor. The author of What’s Gnu?: A History of the Crossword and Crossword Puzzles for Dummies, she currently divides her time between Japan, the land of sudoku, and a small farm in the Berkshires in Massachusetts.