Smart Sudoku 400+ puzzles VARIETY ( Hard to Very Hard levels)

Sit back and plunge into the world of numbers. 50 puzzles Sudoku Calcudoku 9x9 Hard level. 50 puzzles Killer Jigsaw Sudoku Hard level. 50 Numbricks 12x12 puzzles Hard level. 50 puzzles Chain Sudoku 9x9 Hard level. 50 puzzles Sudoku Calcudoku 9x9 Very Hard level. 50 puzzles Killer Jigsaw Sudoku Very Hard level. 50 Numbricks 12x12 puzzles Very Hard level. 50 puzzles Chain Sudoku 9x9 Very Hard level. Unique puzzles. + 250 sudokus difficult level that can be downloaded and printed. + 250 maze puzzles that can 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