There is no cover, but there are no scratches or sun damage. It will be shipped via Yu-Packet Post Mini. ■ Overview From the author of the bestseller "How Mothers Raise Boys Differently!", Nobufumi Matsunaga, and puzzle expert Takahiro Hoshino, a puzzle book that elementary school students and adults alike can enjoy is now available in a convenient paperback edition! By solving puzzles starting today, your brain will become remarkably active. "Children who are good at puzzles can do math." "Children who are good at puzzles win in entrance exams." "Children who are good at puzzles are smart." --This is now common knowledge in the entrance exam education industry. Puzzle education cultivates the foundation of mathematical ability, and many educational institutions are incorporating it. This book explains how humans think and how they arrive at answers by categorizing how the brain works. Even if you can't solve the problems, if you "practice" without giving up, you can acquire the mind of someone who is good at math. Adults can maintain their ever-active minds, and children can prepare for when they become adults. Let's enjoy smart minds by playing with puzzles! (From the preface) 【Author Profiles】 Nobufumi Matsunaga Born in Tokyo in 1957. Director of V-net Educational Counseling Office. Individual learning instructor, educational environment setting consultant, ability development instructor, educational method developer, and educational writer. Takahiro Hoshino Born in Aichi Prefecture in 1970. Representative Director of Chronos Co., Ltd., the only company in Japan specializing in educational mechanical puzzles. Director of the Japan Puzzle Association. Also operates Puzzle Shop Torito and Chronos Puzzle School. 【Table of Contents】 PART 1 "Thinking Techniques" for Solving Puzzles 1 Ladder-type thinking 2 Pyramid-type thinking 3 Exhaustive search-type thinking 4 Reverse-type thinking 5 Simple conversion-type thinking PART 2 "Popular Puzzle Classrooms and Problem Sets" that Elementary School Students are Solving