Book excerpt: Seasonality has effects on a wide range of human functions and activities, and is important in the understanding of human-environment relationships. In this volume, distinguished contributors including human biologists, anthropologists, physiologists and nutritionists consider many of the different ways in which seasonality influences human biology and behaviour. Topics addressed include the influence of seasonality on hominid evolution, seasonal climatic effects on human physiology, fertility and physical growth, seasonality in morbidity, mortality and nutritional state, and seasonal factors in food production, modernization and work organization in Third World economies. This book will be of interest to graduate students and researchers in human biology, anthropology and nutrition.