What makes this book so special: ¿· LOTS OF SUDOKU PUZZLES: 100 hard Sudoku · INCLUDES SOLUTIONS for each puzzle · LARGE PRINT FONT: Puzzles are in large size font, so it's to avoid an eye-strain suffer · HIGH-QUALITY: puzzles are printed on a high-quality white paper so you can use pencils or pens without worrying of bleed-through · EASY TO TEAR OUT: wide margin print, so that you may easily tear out any page if you need It's a scientifically proven fact: sudoku puzzles are a proven method to keep the mind in health. So, click 'Add to Cart', train your brain and keep your mind sharp!