100 most difficult, Saturday edition crossword puzzles.Perfect-bound paperback.*Eye-catching new cover design. Guarenteed to challenge even the most serious puzzle fans, 100 fiendishly-tough puzzles from the Saturday edition of "The New York Times." Breaking down at only 11.5 cents a puzzle, solvers will find this collection as easy on the wallet as it is tough on the brain From crossword editor Will Shortz.