Margaret Atwood, the Canadian writer famous for her inventive and dark novels ? including “Oryx and Crake,” “The Handmaid’s Tale,” and “The Blind Assassin” ? talks with us about science, devotion, and her new novel, “The Year Of The Flood.” Unlike her previous standalone works, this book is something of a companion piece to “Oryx and Crake,” involving characters new and old. It also includes a separate “soundtrack” of hymns about God, the earth and animals.