This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book explores why a crisis creates moral outrage, how extreme crises create unique communicative demands, and what advice could be given to crisis managers facing extreme crises. It provides the background on crisis management and extreme crises. The book highlights the role of crisis communication in crisis management, including its effects as a crisis intervention. It explains what extreme crises are and why they should be an essential element of crisis preparation. The book emphasizes how extreme crises, which begin on the edge, are past the boundaries for applying most crisis communication insights. It also provides crisis communication advice for those crisis managers embroiled in extreme crises. The book presents case studies of extreme crises to refine crisis communication thinking and crisis management skills.