Will Shortz Presents Difficult Sudoku: 200 Hard Puzzles

By Will Shortz

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

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

Also in the series:
-Will Shortz Presents Daring Sudoku
-Will Shortz Presents Dangerous Sudoku

• Format: Paperback
• Language: English
• ISBN: 0312640285
• ISBN13: 9780312640286
• Release Date: July 2011
• Publisher: St. Martin's Griffin
• Length: 320 Pages
• Weight: 0.50 lbs.
• Dimensions: 0.9" x 5.1" x 7.1"