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The navigation designer must first be comfortable with the tools and elements that comprise web navigation, and realize that for any one navigation problem there may be a number of mechanisms that solve it. To help you, Part I presents a general overview of web navigation and the wide range of considerations you must take into account for its design. The first two chapters, "Chapter 1" and "Chapter 2," paint a broad picture of web navigation and basic human information behavior, covering a lot of ground in a short space. These chapters are less practical and more theoretical than later chapters, presenting a sampling of views from other experts, as well as introducing key concepts. Chapter 2, for instance, condenses the field of information seeking into a few pages, distilling decades of research and volumes of literature on the subject. I encourage you to explore the topics of interest further. Follow the references in the text or see the "Further Reading" section at the end of each chapter. The next three chapters shift gears to discuss specific elements of navigation in detail: