This is a comprehensive yet concise and accessible introduction to the history, role, activities and future challenges facing NATO. Assuming no prior knowledge of the subject, author Jennifer Medcalf guides the reader through the complex structure of this organization, providing ample support with a glossary, guide to further reading, chronology and helpful maps. Despite predictions of its imminent demise, NATO is in fact more prominent than ever in international affairs, and this readable introduction will prove essential not only for the general reader, but also for the growing numbers of students on International Relations courses, and for service personnel in NATO and elsewhere.