These sudoku puzzles have been created to test the most brilliant amongst us. The Perfect Great gift for the sudoku lover or the intelligent friend or family member! Sudoku Puzzle Book: Sudoku Activity Book with 100 Puzzles for Adults, Very Hard Level This is the perfect book to buy for yourself. It will help you: 1. Improves your memory. Memory and logic work side-by-side when you are playing Sudoku. 2. Stimulates your mind it also helps your brain work harder reducing anxiety. 3. Reduces the chances of developing Alzheimer's by keeping your brain active. 4. Sudoku Increases your concentration power. 5. Creates a feeling of accomplishment and completion because of the sense of mental stimulation that comes from solving Sudoku puzzles 6. helps you focus, allowing you to tune out the world. 7. can and will lead to a lifelong hobby as it does not have any age limit. 8. It is one of the simplest activities to learn and enjoy, and you can go on to do even more complex puzzles. 9. Everybody can play the game - the kids, the adults, and the elderly. 10. The puzzles calm you down. They give you a much-needed break from the daily chores. Anyone who loves Sudoku, puzzles or a new challenge will love this book! Buy now and enjoy it!