Seriously addicted to crossword puzzles? Then this tear-off desk calendar is for you. It offers not just six challenging puzzles per week (one for each weekday and one for each weekend) but six puzzles whose difficulty increases as the week progresses. Monday's crossword is moderately taxing, Tuesday's is a bit harder, and so on until you reach the formidable Saturday/Sunday puzzle, which may take you the entire weekend to solve. In all you get 313 stimulating puzzles from the undisputed leader in crossword publishing-The New York Times.