PDQ Epidemiologyis an exceptionally clear and highly irreverent review of the important concepts of medical statistics and their impact on public health policy. As the authors note in their preface: .the role of epidemiology these days fills the gaping chasm between the scientific wisdom of the wet laboratory and the clinical wisdom of the ward. By translating the terminology of epidemiology into easy to understand language, the common sense of the methods emerges and makes sense to students. Featuring unique examples titled Circular Reasoning and Anti-intellectual Pomposity Detectors (CRAP Detectors), the text helps the reader identify studies with basic flaws in design or research.