The Constant Princess - Philippa Gregory Very good book. It was a different view on Katherine of Aragon from within the pages of The Other Boleyn Girl. In The Other Boleyn Girl, Katherine appears submissive, weak, and almost accepting of her fate. In The Constant Princess, Katherine is a force to be reckoned with. She fought tooth and nail to remain Princess of Wales, kept up on the court finances, overthrew Lady Margaret from all court business, and beat the Scots. This book makes me wonder what it might have been like if Katherine had remained married to Henry.