The trouble is, they didn’t write it with an open mind. It’s an authorised biography. In other words someone else, well it was two people apparently, wrote it for them with their full cooperation. It will be written from H+M’s point of view. I don’t think much, if any, research will have been done, and in any case, who amongst the other royals is going to give the other side. Historically there are always at least two, often more, interpretations and opinions of any event. This will be undiluted H+M, no doubt spouting the usual rubbish about how they were victims and the royal family were toxic etc etc It will be worded somewhat more diplomatically because that’s what writers do, but it will be the same message. Throw in a bit their wokeness, and add the profit from every book sold to the writers and H+M’s bank accounts, and there you have it. A couple of hundred pages of rubbish.