50% Although the narrative is generally polite, it's also quite modern. Therefore the overuse of 'did he/you not' in the place of 'didn't he/you' is quite jarring.
52% Once again the terms of address are wrong. You cannot be both a Your Grace and a Your Highness because one outranks the other. If this was written properly I could tell who was speaking because there is only one Your Highness male in this novel, and the speaker already referred to him in the third person. You see why correct terms of address are so important?
54% Oh my god. A king is Your Majesty NOT Your Highness. A prince is Your Highness NOT Your Majesty. I know I'm going on about it but how could this book get it SO DAMN WRONG?!