Tough Sudoku: Hard Puzzles

By Will Shortz

Are you tough enough?
Take on this collection of 200 devilishly difficult sudoku puzzles and find out

Includes:
-200 hard puzzles
-Perfect portable size
-Edited by Will Shortz

Also in the series:
-Will Shortz Presents Tough Sudoku
-Will Shortz Presents Terrifying Sudoku

• Format: Paperback
• Language: English
• ISBN: 0312607881
• ISBN13: 9780312607883
• Release Date: January 2010
• Publisher: St. Martin's Griffin
• Length: 320 Pages
• Weight: 0.54 lbs.
• Dimensions: 0.8" x 6.6" x 7.1"