Will Shortz Presents Black Diamond Sudoku: 200 Extreme Puzzles [Paperback]

Watch out! These puzzles are for the most extreme solvers! 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

A puzzling global phenomenon The Economist

The biggest craze to hitThe Timessince the first crossword puzzle was published in 1935. The Times of London

England's most addictive newspaper puzzle. New York magazine

The latest craze in games BBC News

Sudoku is dangerous stuff. Forget work and familythink papers hurled across the room and industrial-sized blobs of correction fluid. I love it! The Times of London

Sudokus are to the first decade of the 21st century what Rubik's Cube was to the 1970s. The Daily Telegraph

Britain has a new addiction. Hunched over newspapers on crowded subway trains, sneaking secret peeks in the office, a puzzle-crazy nation is trying to slot numbers into small checkerboard grids. Associated Press

Forget crosswords. The Christian Science Monitor

Will Shortzhas been crossword editor ofThe New York Timessince 1993. He is also the puzzlemaster on NPR'sWeekend Edition Sundayand the founder and director of the annual American Crossword Puzzle Tournament.