Will Shortz Presents Serious Sudoku: 200 Hard Puzzles : 200 Mind-melting Puzzles

Bok av Will Shortz
Watch out! These Sudoku puzzles are serious! But if you dare, grab a pen and take on these two hundred all-new extra-challenging puzzles. Features: 200 hard puzzles Big grids for easy solving Introduction by legendary puzzlemaster Will Shortz