The book is an introduction to the police and regulatory law of the federal government and the states. References to European Union law and international law are presented in context. At the same time, connections to other areas of administrative law are emphasized. This textbook is aimed at students seeking an entry point, but it is also suitable for a quick review of the fundamentals of the legal field. The effort for clarity is reflected in many integrated examples that also provide assistance in case handling. Control questions facilitate the review of the material covered. Due to the inclusion of various state legal provisions, the book can be used as learning material in all states of the Federal Republic of Germany.