Christina Baker Kline’s THE FOURSOME is a riveting novel based on the true story of the author’s distant relatives, sisters in 19th-century North Carolina who married conjoined twins, Chang and Eng Bunker, with whom they had 21 children. Christina Baker Kline joins us to discuss how she blended imagination and historical research, why she thinks this is ultimately a novel about slavery and complicity, and how she tackled the daunting issue of writing about the sisters’ intimate lives with their conjoined husbands.