The Constant Princess is a splendid and sumptuous historical novel from Philippa Gregory, telling of the early life of Katherine of Aragon. Born Catalina, the Spanish Infanta, to parents who are both rulers and warriors, she is betrothed at age four to Arthur, Prince of Wales, and raised to be Queen of England. She never doubts her destiny to rule that far-off, wet, cold land.

Her faith is tested when she arrives in her new country to a great insult from her prospective father-in-law; Arthur seems little better than a boy; the food is strange and the customs coarse. However, she slowly adapts to the first Tudor court, and life as Arthur's wife grows ever more bearable.

But when Arthur dies, Katherine is left to make her own future. How can she now be queen and found a dynasty? Only by marrying Arthur's young brother, the sunny but spoilt Henry. Despite opposition from his father and grandmother, and her powerful parents proving little use, Katherine's fighting spirit is strong. She will do anything to achieve her aim, even if it means telling the greatest lie, and holding to it.

Philippa Gregory proves again that behind the apparently familiar face of history lies an astonishing story: of women warriors influencing the future of Europe, of revered heroes making deep mistakes, and of an untold love story which changes the fate of a nation.