In the book, Hans-Ulrich von Krantz continues to acquaint readers with the results of his research on the mysterious aspects of the history of the Third Reich. The author of the book "Demons with a swastika. Black magicians of the Third Reich" Hans-Ulrich von Krantz inherited his interest in the history of the ancient Germans from his father, an SS combat officer, and the impetus for writing this particular book was the documents discovered after his death in the safe.