400 + Variete Sudoku 9x9 Hard - Very Hard Cool Mix

Sit back and enjoy the numbers game. 50 puzzles Sudoku "X" Diagonal - Hard level. 50 puzzles Sudoku Central points - Hard level. 50 puzzles Sudoku Hermit - Hard level. 50 puzzles Sudoku Argyll - Hard level. 50 puzzles Sudoku "X" Diagonal - Very hard level. 50 puzzles Sudoku Central points - Very hard level. 50 puzzles Sudoku Hermit - Very hard level. 50 puzzles Sudoku Argyll - Very 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 great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes