To get the most out of this book, you will need to read it carefully chapter by chapter. The book builds sequentially, so that many of the ideas and concepts introduced in earlier chapters underpin more complex discussion of related issues in subsequent chapters. Also, as you go, you should do the exercises in each chapter. Do not check the answers until you have completed all of a particular exercise and are satisfied with them. When you turn to the Answers, Discussion, and Further Advice, you will see that, in most cases, there is further discussion of the issues and concepts relevant to each exercise. As much as you can, don't be tempted to look at the next set of answers until you have completed the exercises for them.