Samurai Sudoku: Book of 500 Puzzles, Overlapping in 100 Samurai Games. Three Difficulty Levels: Easy, Medium, Hard. (Paperback) (ISBN-13: 9798648199330)

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.

• 100 Brand New Puzzles. They are fun, educational and addicting!
• One Puzzle for each page. Large Format (8.5"x11")
• 3 Difficulty levels: easy, medium and hard. Challenge Level will satisfy everybody (from beginner to pros.).
• Hours of entertainment and stress-relieving relaxation.
• Hours of fun for all the ages (from kids to adults)!
• The Perfect Gift for puzzles lovers or people who want to approach 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.