Hard Sudoku Puzzles: 300 Difficult Sudoku Puzzles and Solutions. Perfect for Experts and People Who

Sudoku is a popular puzzle that can be played by everyone. Sudoku can easily provide benefits by: improving your memory (memory and logic are working together to find the solution), increasing your concentration, (you'll learn how to improve your focus skills), by developing your strategical thinking and deductive reasoning.

Training and exercising your mind will make you feel smarter while the sense of accomplishment, after solving a sudoku puzzle, will make you feel happier.

• 300 Brand New Puzzles. They are fun, educational and addicting!
• Large Format (8.5"x11")
• Hard Puzzles: perfect for advanced and expert sudoku players.
• Hours of entertainment and stress-relieving relaxation.
• Hours of fun for all the ages
• The Perfect Gift for puzzles lovers or people addicted to sudoku!
• Don't peek into solutions at the end of the book!!!

Do you need more challenges? Let's make it harder by setting a time limit or check the other Sudoku books in our collection ("Sudoku by SBRT").