"Do you sudoku? Sharper your concentrative and reasoning skills! This addictive, logic-based game involves numbers but requires no mathematical calculations. The 200 sudokus in this notepad build in difficulty levels–from hard to very challenging–and are perfect for puzzling on the go. You'll also find tips on sudoku strategy inside."
Dimensions: 0.75" L x 3.75" W x 5.5" H / 1.9cm L x 9.5cm W x 14cm H