I advise everyone to have this book in library. Because it is very clear, very simple to use and requires no special knowledge of some practical either one hand. And secondly, because the purification of places, objects, people is something important. We can all happened at least once to feel "wrong" in a place with an object or after the passing of someone or feel tension. Purify allows energy to flow freely and gives as new life. I congratulate Arnaud for his hard work and for his valuable advice. A book to put all hands!