Agastya Sudoku 9X9 Puzzle BookSuitable for: This Sudoku Puzzle Book is actually ideal for anyone who knows a little bit about and have learnt the basics of Sudoku Solving Techniques or how to solve 9X9 sudoku puzzles. So, it is better regarded as Sudoku for Beginners, Experts, Advanced Players, Elderly, Inmates, Moms, Old People, Seniors, Young Adults and Teens. Sharpen your mind and have some fun with this mega collection of sudokus, including over 3000 challenges across six difficulty levels. A must-have for all Sudoku enthusiasts.Specialty: Six Difficulty Levels, Contains Twelve Puzzles per Page, Twenty Solutions per PageNo. of Puzzles: 3000Difficulty Level: Very Easy (500), Easy (500), Normal (500), Hard (500), Very Hard (500), Tough (500) Benefits of Playing Sudoku Games: 1. It may help boost logical thinking.2. It may improve memory and recall.3. It may help slow down the negative impact of Alzheimer's Disease and Dementia.(N.B.: However, Playing Sudoku should Not be considered as a Medical Treatment Alternative for any physical or mental illnesses. It is just a form of mental/brain exercise and NOT a treatment.)4. It may help to develop quick thinking skills & may improve concentration.5. It may help reduce anxiety and stress.6. It is a great way to improve a child's problem solving skills.7. It promotes a healthy mindset.