KKurt BrandKurt Brand was a German science fiction author, recognized for works like Mechanica and Der Robotregent. His stories often explore futuristic themes and creatures, including Rhodans Sohn, Hornschrecken, and Schrecken der Hohlwelt.
WWalter ErnstingWalter Ernsting was a German science fiction and fantasy author who mainly published under the pseudonym Clark Darlton. - Wikipedia