This anthology discusses the societal significance of the police in the digital realm. The contributions illuminate the field of digital policing across four thematic areas: communication and interaction with citizens, crime fighting and prevention, legal aspects, as well as organizational prerequisites and hurdles. A variety of questions are addressed: Are virtual police patrols necessary? What role can the police play in the context of cybersecurity? What is permissible for the police on the internet? The contributions examine these questions from an interdisciplinary perspective and address the current developments, challenges, and opportunities that policing faces in a boundless digital space.