Book reviewed in this article:Fundamentals of Oncology, by Henry C. Pitot.Diagnosis of Diseases of the Mouth and Jaws, 2nd edition, by Edward V. Zegarelli, Austin H. Kutscher and George Hyman.Epidemiology, Etiology, and Prevention of Periodontal Diseases.Report of a WHO Scientific Group.World Health Organization Technical Report SeriesThe Oral Manifestations of Systemic Disease, By Gerald Shklar and Philip L. McCarthy.