Logic Puzzles Hard: Kin-Kon-Kan Puzzles - 200 Logic Puzzles with Answers

This book is a great way for you to spend a few hours in deep concentration, working out complex and fun puzzles and conundrums. is a logic puzzle published by Nikoli. The task consists of a rectangular or square grid divided into regions. The goal is to fill in some cells with diagonal lines ("mirrors"). The book comes complete with the solutions at the back, so you'll always know if you got it right, or can find the solution if you are really stuck for the answer.