"Empress Elizabeth of Austria, known as "Sisi," is the Princess Diana of nineteenth-century Europe. Famously beautiful, as captured in a portrait with diamond stars in her hair, she is unfulfilled in her marriage to the older Emperor Franz Joseph. Sisi has spent years evading the stifling formality of royal life on her private train or yacht or, whenever she can, on the back of a horse. Captain Bay Middleton is dashing, young, and the finest horseman...