Will Shortz Presents The Super Book of Serious Sudoku: 300 Challenging Puzzles in Bloomington, MN

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