Black Belt Sudoku for Grand Masters

Are you tired of solving boring Sudoku puzzles and in need of more brain stimulation?

You are in the right place! With this Sudoku book, you will challenge your brain with expert-level Sudoku puzzles especially made for the advanced Sudoku player, you!

Features:

• 100 extremely difficult Sudoku puzzles
• FREE extra puzzles that you can download and print
• Large Print edition with plenty of space to work with
• Solutions key at the back pages