Book excerpt: The primary objective of this Handbook is to provide statements about health behaviour research as a basic body of knowledge moving into the 21st century. It is expected that the Handbook will remain in use and current through 2005, at least. The Handbook presents a broad and representative selection of mid-1990s health behaviour findings and concepts in a single work. While texts and books of readings are available in related areas, such as health psychology, medical anthropology, medical sociology, behavioural health, behavioural risk factors, and changing health behaviours, none of these works was intended to address basic research-generated knowledge of health behaviour, and none was intended to transcend individual disciplines. Accordingly, none of these works presents a broad and representative spectrum of basic health behaviour research reflecting multidisciplinary activities. One work with a title identical to this one but for one word, the Handbook of Health Behaviour Change (Shumaker et al., 1990), deals almost exclusively with applications. This Handbook thus presents the reader with the "state of the art" in health behaviour research, something not found elsewhere.