Mind Wrapper Sudoku Challenge Puzzles Vol 1. Difficult Sudoku Books Edition

Книга "Mind Wrapper Sudoku Challenge Puzzles Vol 1. Difficult Sudoku Books Edition". This Sudoku book is not for the hotheaded. The level of difficulty of the puzzles included here are reserved for the serious learners and those who have the patience to really think deep and figure out patterns. You will not be given clues; rather, you will be left on your own strategies. If you think you can complete this Sudoku book, then buy a copy today!