Joe and Rose Kennedy’s beautiful daughter Rosemary attended exclusive schools, was presented as a debutante to the queen of England, and traveled the world with her high-spirited sisters. Yet Rosemary was intellectually disabled, a secret fiercely guarded by her powerful family. New sources—Rose Kennedy’s diaries and correspondence, letters from teachers and doctors, and family interviews—bring Rosemary alive as a girl adored, but left far behind by her competitive siblings. Holly Marihugh of “BooksLive!” will present Rosemary: The Hidden Kennedy Daughter, by Kate Clifford Larson, with an accompanying slide show.