Book excerpt: First published in 1990. The subject of anorexia nervosa and, more recently, bulimia nervosa in males has been a source of interest and controversy in the fields of psychiatry and medicine for more than 300 years. These disorders, sometimes called eating disorders, raise basic questions concerning the nature of abnormalities of the motivated behaviors: Are they subsets of more widely recognized illnesses such as mood disorders? Are they understandable by reference to underlying abnormalities of biochemistry or brain function? In what ways are they similar to and in what ways do they differ from anorexia nervosa and bulimia nervosa in females? This book will be of interest to a wide variety of people—physicians, psychologists, nurses, social workers, occupational therapists, nutritionists, educators, and all others who may be interested for personal or professional reasons.