Margreet de Heer lives and works in Amsterdam, The Netherlands, with her husband Yiri T. Kohl and theie cat Toto. A long time ago, Margreet studied Theology at the University of Amsterdam, but through divine intervention she ended up being a comic artist. She worked at the famous comic store Lambiek from 2000 until 2005, and wrote a book about Dutch comics together with Kees Kousemaker.
Since 2005, the same year she contributed to the 24 Hour Comic Day Anthology, she is a full-time comic artist producing a wide range of work, from children's comics in magazines to cartoons at business conferences.
In 2007 she started making philosophical comic "reports" for newspaper Trouw. This resulted in a book edition in 2010 which was published in the US by NBM Publishing with the title 'Philosophy: a Discovery in Comics' in 2012.
Margreet continued the series with a comic book about religion in 2011, followed by one about science in 2012. The latter was published in the US with the title 'Science: a Discovery in Comics', in September 2013. 'Religion: a Discovery in Comics' appeared in October 2015. Another part of the series, about World Domination, has appeared in Dutch in 2015. A fifth book is underway, about Love.