Hard Sudoku Books for Adults, 9×9

Description

400 Hard Sudoku puzzles in this book. 

• 9×9 puzzles
• Use numbers 1 – 9
• 4 puzzles per page
• Difficulty level: Hard
• Solutions in the back

Slow the mental decline caused by Alzheimer’s disease by exercising your most important muscle – your brain. Puzzles are useful tools for maintaining brain health.

Do you get frustrated when your phone battery drains too quickly while you are playing games on it? Pick up a puzzle book to give your phone a rest.

You can find more puzzle books and notebooks at BrinkPublishing.com