1000 Sudoku Puzzles 500 Medium & 500 Hard with Solutions at The End of The Book Enjoy hours of fun as you solve these 500 Medium & 500 Hard Sudoku problems. These little brain-twisters will give you hours of challenge and relaxation. Improving brain functioning and provide a nice break from it all! What makes this book so special: SUITABLE FOR ALL LEVELS: from beginner to expert, for adults and kids LOTS OF SUDOKU PUZZLES: 1000 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!