"Left Liberalism in Prussia" is a comprehensive work that documents the minutes of the faction of the German Democratic Party (DDP) and the German State Party (DStP) in the Prussian Landtag from 1919 to 1932. These two volumes provide a deep insight into the political dynamics and challenges faced by left liberalism in Prussia. The minutes allow readers to trace the development and decline of a party that played a central role in the liberal bourgeoisie and whose fate is closely linked to the Weimar Republic. Through the analysis of these historical documents, it becomes clear how political currents and public opinion changed during a crucial phase of German history. The work is of interest not only to social science professionals but also to anyone who wishes to engage with the history of democracy in Germany.