Travel-Size Sudoku for Adults: Medium-Hard

For solvers who already know their way around a Sudoku grid, this book steps up the challenge without changing the familiar 9×9 format. The 100 Medium and 100 Hard puzzles give you a more demanding collection to work through, while the clean two-puzzles-per-page layout keeps each spread focused rather than crowded. The compact size still makes it practical for journeys, holidays or simply switching off with a tougher puzzle at home.