At its present rate of growth, atherosclerosis will be the major cause of death from disease by the year 2020. Atherosclerosis is an extremely complex, biochemical, multifactorial process. This book will cover many aspects of atherogenesis, with particular emphasis on lipid and lipoprotein metabolism. We will cover all aspects of the regulation of cholesterol homeostasis and the importance of each pathway. This book will explore the role of nuclear hormone receptors on lipid and lipoprotein metabolism and their complex roles in atherogenesis. Finally, how the use of genetic studies can help sort out the immense complexities that mediate these aspects of atherogenesis will be discussed.