Sudokus are the ever-popular number placements puzzles that give your brain a workout. Spanning a number of difficulty levels, this collection of over 200 sudoku puzzles comes in an elegantly designed package with an elastic strap, making it the perfect gift for yourself or others. - EXERCISE YOUR BRAIN: Give your mind a great workout as you pit your wits against these number-placement teasers.- REDUCE STRESS: Feel your stress melt away as you focus on these satisfying puzzles.- GIFT EDITION: Designed with a stylish cover, this collection would make a brilliant gift for all puzzle-lovers.