You think you know her story. You've read the Brothers Grimm, you've watched the Disney cartoons, and you cheered as these virtuous women lived happily ever after. But real princesses didn't always get happy endings. Sure, plenty were graceful and benevolent leaders, but just as many were ruthless in their quest for power, and all of them had skeletons rattling in their majestic closets. Princess Stephanie von Hohenlohe was a Nazi spy. Empress Elisabeth of the Austro-Hungarian Empire slept wearing a mask of raw veal. Princess Olga of Kiev slaughtered her way to sainthood. And Princess Lakshmibai waged war on the battlefield with her toddler strapped to her back.