The reluctant heiress

"A charming story of romance, intrigue and opera, by the award-winning and bestselling author of Journey to the River Sea. Spring, 1922. Tessa is a beautiful, tiny, dark-eyed princess - who's given up her duties to follow her heart, working for nothing backstage at the Viennese opera. No one there knows who she really is, or that a fairy-tale castle is missing its princess, and Tessa is determined to keep it that way. But secret lives can be complicated, and when a wealthy, handsome Englishman discovers this bewitching urchin backstage, Tessa's two lives collide - and in escaping her inheritance, she finds her destiny. . . Magic Flutes is an enchanting story of love, music and secret princesses from Eva Ibbotson."
"In 1920s Austria, no one in the Viennese opera company knows that their wardrobe mistress Tessa is really a princess. But when the dashing self-made millionaire Guy Farne arrives at the opera, Tessa realizes that there may be more to life--and love--than just music."
"Spring, 1922 Tessa is a beautiful, tiny, dark-eyed princess - who's given up her duties to follow her heart, working for nothing backstage at the Viennese opera. No one there knows who she really is, or that a fairytale castle is missing its princess, and Tessa is determined to keep it that way. But secret lives can be complicated."@en
"Guy Farne, a self-made millionaire, falls in love with a lovely Viennese woman, buys a castle to impress her, and finds out that she is too shallow to marry."