I decided he'd changed so much that a whole new book was required and that book actually I can say so was the first to say that the marriage was in trouble and the Prince didn't like at all and my book was being serialized in the Sunday Times over five weeks.
Charles was very intent to use his years as Prince of Wales to make his mark while he still had freedom of maneuver that he wouldn't have as King. The first subject he really went for was architecture. It made an impact.
I personally felt that his ad hominen attacks on British architects were not the sort of thing a Prince of Wales should be doing because, apart from anything else, they put various people out of business.