Will Shortz Presents Perfectly Impossible Sudoku: 200 Very Hard Puzzles

Watch out These puzzles are mind melting 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

• Format: Paperback
• Language: English
• ISBN: 1250069068
• ISBN13: 9781250069061
• Release Date: August 2015
• Publisher: St. Martin's Griffin
• Length: 320 Pages
• Weight: 0.44 lbs.
• Dimensions: 0.9" x 5.0" x 7.1"