The specialist book "Preliminary Investigations" by Edda Wesslau offers a comprehensive analysis of the challenges and issues associated with the legalization of preventive crime control from a criminal procedural law perspective. Published in 1989, the work addresses central questions in the field of economics and law, particularly within the subtopic of criminal law. With a paperback cover and a total of 364 pages, the book is of interest to both students and professionals who wish to engage with the legal aspects of crime prevention. The author highlights the complex legal frameworks and discusses the practical implications of preliminary investigations. The book is written in German and originates from Germany, making it a valuable resource for anyone dealing with the legal challenges in crime fighting. It provides well-founded insights and encourages critical engagement with the topic.