"Four Years of Political Murder" - a book written by Emil Julius Gumbel, is an important documentary work that reveals the essence of political terror in the interwar period. The author researches and analyzes a series of political murders that took place in Germany between 1919 and 1922. The book reveals to the reader a shocking picture of how political clashes and ideological confrontations lead to violence and bloody events. "Four years of political murder" is not only historical documentation, but also a call to understand and avoid similar terrible events in the future.