If you haven't yet tried sudoku, you're missing out on the most addictive, fun puzzle sensation since the Rubik's Cube. So pick up a pencil, get set, and solve away! Features:- The """"wordless crossword puzzles"""" that are taking the world by storm!- 100 top-quality sudoku from easy to hard edited by Will Shortz- Introduction and solving tips from legendary puzzlemaster and editor Will Shortz | The Ultimate Sudoku Challenge Presented by Will Shortz, Paperback | Indigo Chapters