Will Shortz Presents Extreme Sudoku: 100 Challenging Puzzles, Paperback

So you think you're tough enough?
This collection of puzzles was created for only bravest sudoku solvers. Many may attempt to master them but only the sharpest minds will succeed. So put your sudoku skills to the ultimate test and see if you're tough enough for these dangerously devious puzzles. But if you find yourself pulling out your hair in frustration, don't say we didn't warn you.

Features:
- 100 very challenging puzzles
- Edited by legendary New York Times crossword editor Will Shortz
- Big grids with lots of space for easy solving

About the Author:

Will Shortz has been the crossword puzzle editor of The New York Times since 1993. He is also the puzzlemaster on NPR's Weekend Edition Sunday and is founder and director of the annual American Crossword Puzzle Tournament. He has edited countless books of crossword puzzles, Sudoku, KenKen, and all manner of brain-busters.