World's Best Grandpa - Sudoku

- Sudoku puzzles are a proven method for keeping the mind healthy and combating Alzheimer's and Dementia

- Hours of entertainment

- 4 difficulty levels: medium - hard - very hard - extreme

- Puzzles are in size 16 font, so that you will never suffer from eye-strain while doing them

- Format easy to use and to take everywhere (6" x 9" paperback)

- Perfect gift for that special someone