Will Shortz Presents Hard Sudoku Volume 1: 200 Challenging PuzzlesPaperback, 13 February 2018

The first in a new series: hard puzzles for serious sudoku solvers.

Do you have what it takes? These 200 challenging sudoku puzzles from Will Shortz will keep your mind sharp!

Features:

• 200 hard puzzles
• Big grids for easy solving
• Introduction by legendary Puzzlemaster Will Shortz