100 Sudoku for the Road

Pack a brain workout in your carry-on. 100 Sudoku Puzzles for the Road delivers one hundred classic 9x9 sudoku puzzles in a compact 6x9 travel trim that slips into any glove box, backpack, or seat-back pocket. Twenty-five puzzles each at easy, medium, hard, and expert difficulty give you a steady ramp from coffee-shop warm-up to white-knuckle showdown. Every puzzle has exactly one solution, and a complete answer key in the back is there when you need a nudge. Perfect for road trips, layovers, train rides, and the long quiet hours when a phone just won't do.