It is a book that any dowser should read. He does it almost full turn energy distortions we face. Whether since the dawn of time, or more recently with electromagnetic pollution or WiFi. Although some alignments have advanced techniques, the information given in this book are always efficient and news. I really think it is an indispensable book that wants to know, understand and act on some of these waves. Much knowledge of what books are used me every day in my practice.