hermod wrote:....
What makes you think that it was written by Hoess under supervision? Good ghostwriters can create a whole life out of thin air with a few biographical notes and a lot of imagination. A New York unemployed Jewish writer or another didn't need more than some biographical information on Rudolf Hoess, a copy of the Vrba-Wetzler "report," and a transcript of Hoess' testimony at the Nuremberg show trial to write such a book.
It's a working hypothesis. I assume that Hoess was in Communist Polish Custody. And that he was kind of their "star prisoner". It's highly unlikely that he didn't draw the attention of 'the authorities'. If he wrote a longer text, there would be supervision.
I can't of course say that it wasn't a ghostwriter, but getting a prisoner (fearing for his life and the life of his children) to write something you want sounds more feasible to me. There is of course problems with the text, but that doesn't mean it was a ghostwriter. What it means is that the text does describe things that aren't real. That didn't happen.
I'm using Occam's razor here, assuming the lowest effort to get something into being.