Viral hepatitis, a disease which, surprisingly, turned out to be the major epidemic of infectious disease in World War II, has received intensive study then and since that time, but, in spite of the tremendous amount of research, advances in our understanding of the disease have been disappointingly meager. This volume is particularly useful as a manual for health officers, army physicians, and those in practice away from large centers. It sets forth in detail methods for diagnosis, treatment, and, hopefully, for prevention. The manual was intended just for such purposes. Theoretical discussion is necessarily short. Also, the clinical side of the argument is not nearly so detailed or as well covered as the laboratory procedures. Altogether, this is a very useful and convenient field manual, which does not pretend to be anything else.