In Elizabeth Strout's new book, a familiar character - Lucy Barton - returns when ex-husband William asks for her help unraveling a recently discovered secret, one that forces him to reevaluate what he knew about his family. Even though it's been decades since they split, the two embark on a trip to uncover the truth. Because, whether you like it or not, sometimes your ex is the only person who really knows you. In today's episode, Strout joins Here and Now's Robin Young to talk about the complexities of the ties that bind us.