Dr. Rosenthal's timely and erudite book on BCG vaccination deals not only with the clinical and immunologic considerations for the use of BCG vaccine, but also with its administration as part of a public health program, its technical production, and a clinical and experimental guide and analysis of its efficacy. At a time when there is a widely felt need for a workable and extensive program of immunization against tuberculosis in the United States, Dr. Rosenthal's case for the adoption of BCG vaccination must needs claim the wide audience among the medical and public health practitioners its scholarly and interesting presentation earns for it.