400 Variete Sudoku 9x9 - Hard - Cool Mix of Puzzles + Bonus + Surprise: Holmes Presents to Your Attention a Collection of Carefully Tested Sudoku. For

Sit back and enjoy the numbers game. 100 puzzles Sudoku "X" Diagonal - Hard level. 100 puzzles Sudoku Central points - Hard level. 100 puzzles Sudoku Hermit - Hard level. 100 puzzles Sudoku Argyll - Hard level. Unique puzzles. ] bonus in 250 classics very hard levels Sudoku 9 x 9 (bonus puzzles need to be downloaded and printed). Only 1 verified solution. All answers are at the end of the book. Exclusive puzzles. A link to the surprise is at the end of the book. A great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes