This is an exceptionally valuable and useful book. Despite the outrage and turmoil caused in recent years by corporate scandals, many people, including highly trained and responsible people, do not know how to think about their own ethical conduct and do not know that they don't. Often their professional education includes only cursory and perfunctory training, if that, on the codes of professional ethics that apply to them. They believe that since they are moral and ethical people they will know what is the right thing to do and will do it. This is a snare and a delusion. The right thing to do is often counter-intuitive and difficult to figure out, and errors can be catastrophic. The beauty of this book is that it provides a framework for systematic thought about the dilemmas of ethical conduct, not only those presented by ethical codes, but also those presented by conflicts between a person's professional obligations and his own personal ethical beliefs. Anyone who absorbs the authors' lessons can face these dilemmas without panic. The book would be an outstanding text for courses on professional ethical conduct, but would also repay close reading by anyone, in or outside of a course.