The fascinating story of endocrinology will captivate the lay reader and the physician as well. The tremendous enthusiasm of the author for his subject permeates the entire volume. Each of the endocrine glands is discussed in a separate chapter. Enough of the early history of investigations in endocrinology is presented to give an adequate evaluation of the enormous advances in the knowledge of this field in recent years. Care has been observed always to keep within the bounds warranted by reliable scientific research, and the suggestions of the untold possibilities of the glands in influencing every-day activity, emotions and personality are discussed with judgment and caution. The basic anatomy, physiology and pathology of the endocrine system, as well as animal experiments and clinical observations, are presented adequately. The present-day knowledge of the endocrine glands and hormone activity is well summarized in an excellent, readable form.