This article challenges four persistent assumptions in German-language postwar literary histories on crime and detective fiction that have led scholars to conclude that no literary tradition existed between 1900 and 1933 in the Germanspeaking world. These assumptions were that little German-language crime and detective fiction existed, that authors should still be well known today, that only works of high literature should constitute a tradition, and that crime and detective fiction should conform to Golden Age generic rules. By problematizing these assumptions, I provide an alternative perspective on the literature that existed and suggest approaches to understanding this invisible tradition. (JK-B)