* 200 tough Sudoku puzzles - pure brainpower required! * The cult classic from Japan guarantees hours of fun and mental focus * All solutions included at the back Sudoku has become one of the world's favorite puzzle types--and it's easy to see why: simple rules, but tricky solutions. This book is packed with 200 hard-level Sudokus , designed for true puzzle lovers who enjoy a serious challenge. Test your logic, sharpen your focus, and push your concentration to the limit. With patience and persistence, you'll sharpen your skills and master even the toughest grids. Warning: These clever number puzzles are seriously addictive!
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