Prince Shen Teal is looking forward to seeing his annoying older brother Kale married to the eldest daughter of the Queen of Taiwan, but he's not enjoying the long sea voyage on the tall-masted European ship The Unicorn, where the food is even more nauseating than the motion of the waves. It's a long way to go for a wedding. But one day he wakes up in another World, in the body of a girl, and with his dead mother leaning over him. Ji Ye and John, with the essential help of Bart the cat, find themselves all at sea when they find their daughter has been replaced by this self-assured, competent young fighting man. What has happened to Yifan? How can this boy fit into Yifan's school life without exposing them all? And what are they going to do about the invitation to a State Banquet at Buckingham Palace? When Yifan wakes up the bed is moving, and there are some nasty surprises in store for her - dragons, tidal waves and the mysterious Dutch Captain of the Unicorn are bad enough, but when she meets an eleven-year-old Princess who has just killed her first man she realises that she doesn't know quite how dangerous her new life could become. Prince Yifan is the second book in the Worlds of Yifan series. The familiar characters from Princess Yifan are joined by the larger-than life Regent of Joseon and his sons Kale and Teal, the mysterious Captain de Vlieger and the scientist Alan Baer, whose hopes of a Nobel prize might just expose Yifan's Worlds-travelling secret and put the family in peril.