Today's first interview is with author Peng Shepard on her new mystery. A father and daughter, both cartographers, haven't spoken in seven years. But when the father is found dead, his daughter must use their shared skill to solve the mystery of his death. Shepard told NPR's Elissa Nadworny that obsession can be a stand-in for the person lost. Next, Anne Tyler on her new book which follows a family in Baltimore across several generations. Tyler told NPR's Mary Louise Kelly that she likes to write about families because they sort of have to love each other even when they annoy each other.