The riveting true story of two sisters' journey to the Islamic State and the father who tries to bring them home Two Sisters , by the international bestselling author Åsne Seierstad, tells the unforgettable story of a family divided by faith. Sadiq and Sara, Somali immigrants raising a family in Norway, one day discover that their teenage daughters, Leila and Ayan, have vanished--and are en route to Syria to aid the Islamic State. Seierstad's riveting...