Dr. Marshal Goldsmith, the author of this book, is one of the most successful leaders and entrepreneurs in the world. Goldsmith has worked with more than a hundred and fifty executive managers, for the most important companies and institutions in the world. His task is simply as he loves to clarify it is to make successful people more successful, by reaching more sustainable levels of positivity in their personal and practical lives, by modifying their unpleasant behaviors and planting more useful behaviors.