WAS IST WAS - Earth

WAS IST WAS is one of the most iconic children's non-fiction brands in the German-speaking world. The brand originated in Germany in the early 1960s, inspired by the American 'How and Why Wonder Books'. The series is published by the Tessloff Verlag, which was founded by Ragnar Tessloff.

Over the decades, WAS IST WAS has become a household name for educational content, covering topics from volcanoes and geosciences to space and history. While the content is developed and published in Germany, global translations and license productions mean books may be printed in various locations depending on the market, though core high-quality editions for the DACH region are typically printed in Germany.