91000 PUZZLES & FULL SOLUTIONS: This is truly a NUMBRICKS book like no other. With 1000 puzzles inside, it is guaranteed to provide you with hundreds of hours of fun.FOR ADULTS & KIDS: Puzzles are appropriate for both kids and adults alike 5 DIFFICULTY LEVELS: Whether you are a pro or just starting to play numbricks puzzles, you will find an appropriate challenge level in this book. Each of the 5 levels, from EASY to EXTREMELY HARD has 200 puzzles.EASY-TO-READ FONT: Puzzles are in size 20 font, so that you will never suffer from eye-strain while doing them.PRINTED ON HIGH-QUALITY PAPER: Puzzles are printed on 60-pound high quality white paper so you can use pencils or pens without worry of bleed-through.KEEPS YOUR MIND HEALTHY: Numbricks puzzles are a proven method for keeping the mind healthy and combating Alzheimer's and Dementia.A GIFT LIKE NO OTHER: If someone in your life loves numbricks puzzles, you won't find a more unique and substantial gift than this book.