The advanced collection of a new trio of easy, medium, and hard crossword puzzle books from The New York Times, edited by Will Shortz. If you love the challenge that comes with the New York Times' hardest puzzles, you've met your match with this seriously hard collection of 200 Friday and Saturday crosswords.

• 200 of the most difficult puzzles from the Times
• Puzzles edited by crossword legend Will Shortz
• Convenient portable paperback size for on-the-go solving