James Bond and Jason Bourne shape our perception of the work of intelligence agencies. However, in reality, it is not only men who serve as agents. Since the time of the German Empire, many women have worked for German and international intelligence services. They steal military documents, monitor and sabotage their opponents, recruit informants, and unmask enemy spies. Yet, despite the fact that female agents are in no way inferior to their male counterparts, their influence on history has been underestimated to this day. Maik Baumgärtner and Ann-Katrin Müller have researched their secret cases from the past hundred years, evaluated numerous files, and spoken with former and active female secret agents who served in or for Germany. In this book, the two SPIEGEL journalists tell their stories and reveal who the women were that paved the way for today's generation of female spies.