Isabel Thielen (Autorin) - Gütersloher Verlagshaus

Isabel Thielen

Christine Koller, born in 1967, is a journalist working in print media. She has dedicated herself intensively to the subject of coaching for ten years, writing for a career newsletter amongst other things. Read more on

Dr. Stefan Riess, born in 1957, was deputy editor-in-chief of the magazine "emotion" from 2005-2007. Today he is editor-in-chief of a major Munich-based publishing house.


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