What makes this book so special:LOTS OF SUDOKU PUZZLES: 100 hard SudokuINCLUDES SOLUTIONS for each puzzleLARGE PRINT FONT: Puzzles are in large size font, so it's to avoid an eye-strain sufferHIGH-QUALITY: puzzles are printed on high-quality white paper so you can use pencils or pens without worrying of bleed-throughEASY TO TEAR OUT: wide margin print, so that you may easily tear out any page if you needIt'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!