This exquisitely imagined novel opens as the great astronomer and composer William Herschel rescues his sister Caroline from a life of drudgery in Germany and brings her to England and a world of music-making and stargazing. Lina, as Caroline is known, serves as Williamś assistant and the captain of his exhilaratingly busy household. William is generous, wise, and charismatic, an obsessive genius whom Lina adores and serves with the fervency of a beloved wife. When William suddenly announces that he will be married, Lina watches as her world collapses. With her characteristically elegant prose, Brown creates from history a compelling story of familial collaboration and conflict, the sublime beauty of astronomy, and the small but essential place we have within a vast and astonishing cosmos. Through Lina's trials and successes, we witness the dawning of an early feminist consciousness, of a woman struggling to find her own place among the stars.