400 + VARIETE Very hard levels Calcudoku - Killer Jigsaw Numbricks - Chain.

Sit back and plunge into the world of numbers. 100 puzzles Sudoku Calcudoku 9x9 Very hard level. 100 puzzles Killer Jigsaw Sudoku Very hard level. 100 Numbricks 12x12 puzzles Very hard level. 100 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