This guide is based on the experiences gathered in public and academic libraries regarding conflict and danger situations. It focuses on prevention and highlights possible solutions. The author addresses typical library issues and provides valuable advice on dealing with aggressive users, challenging youth groups, as well as users with addiction or mental health issues. The book also discusses various types of offenses such as theft, vandalism, and insults. The author offers communication techniques and phrasing aids, along with practical tips for self-protection in the event of physical attacks. This third revised and expanded edition includes six new chapters, including three guest contributions. "A book of general significance." Uwe Füllgrabe, Kriminalistik 6 (2007).