Kurt Wolff founded the legendary series "Der Jüngste Tag" in 1913: it featured the first books by Franz Kafka, Robert Walser, and others. This volume sheds light on the motivations behind this endeavor and how its marketing took place in the context of inexpensive books. Its starting point is the question: Are certain series and their publishers tied to literary movements, specifically in the case of Kurt Wolff Verlag to Expressionism? This question is discussed in the context of the literary market situation in Germany in the first half of the century and answered through a comparison between "Jüngster Tag" and "Insel-Bücherei," the Kurt Wolff Verlag and Insel Verlag.