Deutsch, Warum Nicht? (literally: German, Why Not?) is a personal course for learning the German language, created by Deutsche Welle and the Goethe-Institut. Available via a collection of CDs and books, the course teaches German through fun stories involving various characters. It is divided into three books, of which the first is composed of four series with 26 lessons each.
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Deutsch, Warum Nicht? Wikipedia(Text) CC BY-SA