Get into the habit of completing a Sudoku puzzle everyday. This is one of the best ways to maintaining and even improving your mental acuity. Sudoku is a mind game. You'll have to use your logic an...więcej »
This is a huge Sudoku puzzle book not only because it's large print but also because it has 400 exercises inside. Sudoku is a widely recommended brain game that boosts logic and memory. It also pro...więcej »
You've been playing Sudoku for quite some time so you should think about leveling up next. This book of Sudoku has hard to extreme puzzles. Such puzzles stimulate the brain so that it remains activ...więcej »