The Ultimate Brain Health Puzzle Book for Adults: Engaging Word Games, Challenging Logic Puzzles, Relaxing Activities, and Brain-Boosting Fun for Focus and Mental Clarity Duane, G. Pitts
1000+ Sudoku Puzzles for Adults: A Book With More Than 1000 Sudoku Puzzles from Easy to Hard for adults. Nova, Publishing XR
Classic Game – Matchstick Math Puzzles: A set of brain teasers to improve your thinking and concentration AG-Arthur, Gwara
