It is by reading the book at a friend I discovered the wealth of the latter. Not being martial artist, this book gives a certain number of keys to protect themselves and prevent "problems", whether at home or elsewhere. This book draws attention to the details of everyday life that often we neglect or forget it. It was not only a martial concept but also important points such as prevention and IT security, check lists to prepare for a trip, etc ... All these tips, these reminders are present in a very didactic, clear and concise. I recommend this book that brings openness to the world around us and how to remain vigilant faces different risks there are.