Sudoku 1,000 Puzzles 500 Hard & 500 Very Hard with Solutions: Take Your Playing to the Next Level with This Sudoku Puzzle Book Containing Two Levels o (Paperback)
Sudoku 1,000 Puzzles 500 Medium & 500 Hard with Solutions: Take Your Playing to the Next Level with This Sudoku Puzzle Book Containing Two Levels of D (Paperback)