Nazi book burnings
A year later, in 1932, his "Deutschland erwache! Geschichte des Nationalsozialismus" appeared, an early study of the danger of the Nazi movement. When the May 1933 Nazi book burnings took place, Ottwalt's works were on Wolfgang Herrmann's blacklist. In addition, his name was marked with an "x", identifying him as one of the "real vermin", along with Lion Feuchtwanger, Ernst Gläser, Arthur Holitscher, Alfred Kerr, Egon Erwin Kisch, Emil Ludwig, Heinrich Mann, Theodor Plivier, E.M. Remarque, Kurt Tucholsky and Arnold Zweig, who were to be "stamped out of bookstores".