Given the broad intended audience, this book contains a variety of material, some of which will be of most interest to particular types of readers. As a result, there are different paths through this book. The best approach, naturally, is to read all chapters in order. They’re designed to be an integrated whole – each chapter builds on the next, there are multiple cross-references between chapters and some examples run throughout the book. However, readers short on time may choose to focus on particular chapters, depending on their objectives.