I have checked and mr Petropoulos book "The princes and the reich" is not available in Swedish (my first language). However, I found out that the English version is available through a Swedish internet bookselling site, and now I have ordered it and am eagerly waiting for it. I doubt that it will be translated to Swedish. Reading a book like this in a language which is not my first, will be quite a challenge for me, but I am hoping my poor English will benefit from the practice!

I did not know about this book at all, so thank you, Iskenderbey, for mentioning it.
Carl Eduard of Saxe-Coburg-Gotha was a despicable little man. He grew up without a father? Well, poor him. I am sure he had a large, loving family to guide him anyway. He and his fellow nazi trash made sure that thousands of children had to grow up without a father (including my mother!) and even without any family at all.
He was the head of the German Red cross, and the German Red cross was ruled by the nazis. When cars from the German Red cross arrived at concentration camps the poor people held prisoned there tried to hide as well as they could, as they knew only too well that being transported by the German Red Cross did not mean one was saved - in contrary, it meant transport to a death camp or similar. Nobody can convince me that the head of the German Red cross, duke Carl Eduard of Saxe-Coburg-Gotha,
did not know anything about this. Maybe he was stupid, but not that stupid.
This is my few pennies on Carl Eduard and his great granddaughter princess Madeleine. I can see a very slight resemblance. Let us hope, for Madeleine's sake, that those are the only genes she has inherited from the duke.
The resemblance between Carl Eduard and his embittered daughter Sibylla is rather striking, though.