199 Hard Sudoku

By John Rob

199+1 hard unique sudoku puzzles for advanced solvers. Contains a graded collection of medium (warmup) to very hard puzzles. Each puzzle has a unique solution.

• Format: Paperback
• Language: English
• ISBN: 1508947287
• ISBN13: 9781508947288
• Release Date: March 2015
• Publisher: Createspace Independent Publishing Platform
• Length: 140 Pages
• Weight: 0.43 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"