This British publication is a new monograph dealing with all the antibiotics in common use. It is divided into chapters according to individual or closely related antibiotics, or according to their derivation from molds or bacteria. Each chapter deals with such aspects as methods of production, assay, antimicrobial spectrum, pharmacology, absorption and excretion, clinical use, preparations, chemical structure, and synthesis. The space devoted to manufacturing procedures, chemistry, and bacteriology greatly exceeds the space given to pharmacological and clinical information. Because of the rapidly changing developments in the antibiotic field, the book is out-of-date from the standpoint of current therapeutic knowledge in the United States. Historically, much of the basic information will be of interest to workers in the antibiotic field. Its appeal to American readers will be diminished by the use of British terminology, especially in the nomenclature for micro-organisms. An index is provided. The printing is clear; the binding