The author is a psychologist. In his book, he explains that generally we think that we need a radical change quickly and dramatically when we want to change something. Excluding the amygdala, a part of our brain generates fear at every change or challenge in our reassuring routine. This has the effect of blocking us. The method of kaizen, the Japanese term avoids this by starting with a very small share. Thus, our brain deceives and one can change. Gradually increasing our action, we arrive ultimately at the desired change. The author explains the application of this method in different areas of our life with concrete examples. If you want to change something in your life and be sure of success, this is the book to read. Good practice.