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Karl Olsberg

Author

Karl Olsberg completed his doctorate on artificial intelligence, was a management consultant, manager at a TV station and founded several start-ups. His first novel "Das System" was published in 2007 and immediately made it onto the Spiegel bestseller list. Since then, he has not only successfully ...

Christiane Oppermann

Author

Markus Orths

Author

Markus Orths lives in Karlsruhe and writes his books there from morning to evening. He has already completed 15 books for adults and nine for children. Naturally, he writes the children’s books for his own children as well, three in total. Any similarities between the Hackebart family and the ...