Keep Your Mind Sharp Over The Holidays150 puzzle Sudoku Pocket Books in Medium To Hard LevelA compact size 5 x 8 Inch, handy bookbinding for easy travelingPerfect Travel Activity Book For Adults The easy way to exercise your brain on holiday. 2 Puzzles Per Page, solving could be easy on your eyesSimple instructionsAn answer key for that sudoku puzzles If you'd like to boost the performance of your brain and enhance the effectiveness of your brain function. You should use this sudoku puzzle book. You could reduce your probabilities of Dementia or Alzheimer's simply by solving Sudoku puzzles. By using this selection of sudoku puzzle books you would experience enhanced brain capabilities for example focus, logical thinking, and memory. Choose your book today by clicking on the BUY NOW button at the top of this page.