The book "Weapons from the Printer - The New Era of Gun Manufacturing" offers an in-depth analysis of the impact of 3D-printed firearms on internal security. Written by Jörg Sprave, a Spiegel bestselling author and YouTube personality, along with experts in the fields of weapon manufacturing and law, it highlights the challenges that digital weapons without serial numbers and registration pose to states. The authors explain how these technologies appear in extremist scenes and international networks, and what security policy consequences arise from this. Using case studies from Germany, Europe, and the USA, the topic is presented in a clear and fact-rich manner. The book does not provide DIY instructions but offers a clear analysis of the technology, the threat landscape, and the legal and societal implications. It is aimed at anyone interested in the security policy implications of 3D weapon technology.