Shop Skipper's Online › NYT Seriously Hard Crossword Puzzles: 200 Challenging Puzzles Image 1 of 1 NYT Seriously Hard Crossword Puzzles: 200 Challenging Puzzles $16.00 The advanced collection of a new trio of easy, medium, and hard crossword puzzle books from The New York Times. Quantity: Add To Cart Added! The advanced collection of a new trio of easy, medium, and hard crossword puzzle books from The New York Times.