Brain Twisters Sudoku Challenge Vol 3 : Extreme Sudoku Puzzles Edition

Sudoku is the kind of paper-based game that would appeal to players of all ages.

It appeals to your logical thinking skills, and they are paced just right to encourage challenge and perseverance.

There is no rule that tells you that you must complete the book in one seating.

You don't even have to try. What matters is that you enjoy the game and you relax at the same time.