A marvellous achievement and written with care and an ability to maintain interest even during the less exciting parts of MacMillan's long life. It benefits from MacMillan's private diaries and from conversations Horne had with the old man. Even the controversial aspects are sensitively informative (I am thinking here about the White Russians fighting on the Allied side in WW2 who are sent back to Stalin and their deaths) and there is no disguising the long-term adultery of Dorothy MacMillan and the obvious pain it caused. So, no hagiography. I would say the book is a model of its kind.