 Hiemer began working with Julius Streicher in the 1920s, as a journalist for Streicher's weekly anti-Semitic newspaper "Der Stürmer", for which he reported on trials of Jewish offenders.Using the knowledge and experience he had gained working as a teacher, Hiemer wrote two anti-Semitic books for children which were both published by Julius Streicher's "Stürmer" publishing house.The first of these was "Der Giftpilz" ("The Poisonous Mushroom"), published in 1938.