There's always time for a little mental exercise and what better way to flex your mental muscles than with sudoku? So grab a pencil and strengthen your mind today!*Refresh and renew the little grey cells with 100 sudoku puzzles*Edited by legendary puzzlemaster Will Shortz *Big grids with lots of space for easy solving | Will Shortz Presents Sudoku to Exercise Your Brain, Paperback | Indigo Chapters