■ Book Summary
We can often find rules of 70% in our life. Let’s figure out the secret of 70% around the world. You can find amazing life experience in it. This book will make young readers realize wisdom for happiness through the secret of 70%, which is no more and no less.

■ The Happiness from the Secret of 70 Percent
If you find the 70 percent rule here and there in your daily life, you also will realize that you don’t necessarily have to pursue 100 percent achievement all the time. Keep that in mind and try to relax and find the 70 percent rule in you.
The author said that while writing this book, she decided not to push herself to be a 100 percent perfect mom. Then, she became more understanding; she didn’t expect her child to be a 100 percent achiever. A 70 percent mom and a 70 percent child are good enough. What matters more is how happy we are right now.
In fact, 70 percent is not bad. It is a lot more than half after all. After you read this book, it will be great if you can say to yourself, “Well done,” with a smile of satisfaction instead of “I should do better next time” on your test score of 70 marks. Trying to be perfect 100 percent of the time is stressful. Learn to cherish the value of 70 percent and do not worry about the remaining 30 percent. If you can look around and discover your possibilities that are twinkling like the stars in the night sky, you will be able to lead a happier life.