The Dove in the Eagle's Nest

Historical novel, set in Germany. According to Wikipedia: "Charlotte Mary Yonge ( 1823 - 1901), was an English novelist, known for her huge output, now mostly out of print. ... She began writing in 1848, and published during her long life about 100 works, chiefly novels. ... Among the best known of her works are The Heir of Redclyffe, Heartsease, and The Daisy Chain. A Book of Golden Deeds is a collection of true stories of courage and self-sacrifice. She also wrote Cameos from English History, Life of John Coleridge Patteson: Missionary Bishop of the Melanesian Islands and Hannah More.... Although Yonge's work is largely out of print today, during her lifetime she was admired and respected by such notable literary figures as Alfred Tennyson and Henry James, and strongly influenced the Pre-Raphaelite Brotherhood, especially William Morris and D. G. Rossetti."