I was a young mother living in our first (post World War II subdivision/G.I. Bill of Rights) house when I read that book. Since almost everything was introduced to me via Book of The Month in those days, I think it probably came from that source. I remember the book vividly, because I was truly passionate about English History from 8th grade (Miss Lewis) on, and that book helped me sort out the who was who a great deal, as did Thomas Costain's 4 book series The Last Plantagenets that came out in about that same time period: the forties, fifties and sixties. All of Costain's books, as a matter of fact, were most excellent in fixing the fabric of history in my head. But I think it was Kathryn (the book) that sealed my partisanship with the White Rose permanently, as I could "get" that Parliament meant that the crown should always come down through legitimate heirs and never, ever descend on the head of one of the Duke of Gaunt's born out of wedlock. Not that it makes any difference to me personally, but something in me wanted to choose a side for once and for all, and for that, principally, and for a myriad other reasons I was and remain a Yorkist. That being said, there has been throughout the history of mankind another and very final method of gaining the throne, and that is by conquest on the field of battle. Is it not sick making to think that has consistently been the real game changer throughout the centuries?