Riegel published a monograph, Mobilizing for Chaos, in 1934. In it he examined and explored the impact and importance of the use of propaganda in the contemporary world. He effectively explored the use of propaganda in nations such as pre-War Germany and its role in the rise of National Socialism and Adolf Hitler. This series contains material related to the publishing of the book, Mobilizing for Chaos. These materials primarily consist of book reviews, advertisements, and articles about Riegel's role in its creation.