The chapter presents an overview of the book "Danger in the Field," by Geraldine Lee-Treweek and Stephanie Linkogle. There is a range of dangers involved in investigating social life of which researchers should be more aware. These dangers have often not been explored, or in many cases even identified, in methodological literature. The book aims to remedy this gap by making danger visible and explaining its relationship to data collection and the understanding of social phenomena. This is not a book about the general problems of research; indeed it draws a line between dangerous aspects of research and aspects of the research process which are merely challenging or difficult. In the case of studying dangerous occupations, danger and risk may be part of the participants' world as an everyday reality and defining feature of the work. In other situations the experience of an unusual dangerous event, such as a disaster or bout of disease, may allow the researcher to see how participants mobilise against the threat.