200 Challenging 9x9 Brain Teasers for Travel and Home, Compact 5x8 Size

Looking for a serious Sudoku challenge you can take anywhere? A Travel-Friendly Sudoku Challenge Book Hard Level Puzzles for Adults Who Love Brain Games, Mental Exercise, and Screen-Free Entertainment

This Hard Sudoku Puzzle Book for Adults is designed to test your logic, focus, and problem-solving skills perfect for puzzle enthusiasts who crave brain-boosting fun.