Sudoku Hard to Extreme

Perfect for sharpening concentration and reasoning skills, here are 200 all-new Sudoku puzzles that build in difficulty level from hard to very challenging. A musthave for every on-the-go Sudoku sleuth!

The Details:

• Pages: 262
• Dimensions: 6.3 x 3.9 x 0.9 in (15.9 x 9.9 x 2.2 cm)