Ideal for your commute, to relax at home, and even for beginners of this super addictive game, both kids and adults. ¿This book with hours of fun inside makes a great gift! We've had your entertainment and convenience in mind when designing this book and thought about the small details which make a difference: · Wide center margins making it easier to work on the puzzles when you fold the book · Bigger font and better quality paper than newspapers and magazines - easy to read and write on without worry of bleed through · Problem levels has been expertly assessed for consistency. No wasted puzzle in this book. · 6 problems per page with instructions and solutions at the end of the book Your brain says thank you!