Only Hard Sudoku: 400 Challenging Puzzles

By Manuel Castillo

This book presents 400 challenging sudoku puzzles.The answers are provided at the end, but can you solve the puzzles without looking?

• Format: Paperback
• Language: English
• ISBN: 1499311559
• ISBN13: 9781499311556
• Release Date: April 2014
• Publisher: CreateSpace Independent Publishing Platform
• Length: 264 Pages
• Weight: 1.15 lbs.
• Dimensions: 9.3" x 0.6" x 7.5"