"description":"American Author Robert Arthur Jr's juvenile book series \"The Three Investigators\" was very popular in Germany, especially in the form of audio books.\n\nWhile the business card with 3 question marks was mentioned in the original stories, it is a central symbol in Germany, as the stories were published under the title \"Die Drei Fragezeichen\" (\"the three question marks\"), with the white, red and blue marks on a black background on every book. New stories continue to be published for the German market to this day. ",