The book "The German Security Service in America 1914-1918" examines the activities and influence of German intelligence services in the United States of America during the First World War. The authors, John Price Jones and Paul M. Hollister, carefully examine the role of German intelligence on American soil, revealing important details about their operations, agents, and attempts to influence events in the United States during the war. The book demonstrates not only the danger that German intelligence posed to American national security and defense capabilities, but also the importance of intelligence and counterintelligence activities during this difficult period. Through the prism of the events of the First World War, the reader gets the opportunity to better understand the relationships between states, agents and intelligence services of that time. The authors draw on original sources and analysis to reveal the role and influence of the German security service in America during World War I. This book will be a useful resource for those interested in the history of intelligence operations and international relations during the war.