Second-Degree Black Belt Kakuro: Conceptis Puzzles, Paperback

When just having a black belt in kakuro isn't enough, step up to the next level These tricky puzzles require the very best skills-and give top solvers the complete mental workout they want.

About the Author:

Conceptis Ltd. is the leading number-logic and picture-logic puzzle supplier to magazine, newspaper, book, mobile, game console, and board game providers all over the world. Every day, over 10 million pages with Conceptis puzzles are printed in 40 countries worldwide.