Will Shortz Presents Difficult Sudoku: 200 Hard Puzzles
Will Shortz has been the crossword puzzle editor ofThe New York Timessince 1993. He is also the puzzlemaster on NPR’sWeekend Edition Sundayand is founder and director of the annual American Crossword Puzzle Tournament. He has edited countless books of crossword puzzles, Sudoku, KenKen, and all manner of brain-busters.