Will Shortz Presents The Super Book of Serious Sudoku - 300 Challenging Puzzles

Blossom into a true sudoku expert!

For those who are serious sudoku addicts comes a new collection that is both challenging and convenient to take wherever you go. This volume of 300 devilishly difficult sudoku grids is the perfect recipe for hours of entertainment.

Features:
- 300 hard sudoku puzzles
- Big grids for easy solving
- Introduction by puzzlemaster Will Shortz