Celebrated Irish writer Colm Toibin joins Forum to talk about his new novel, “Nora Webster,” a story about a woman who loses her husband in 1960s Ireland. The Guardian calls the book “a rare and tremendous achievement.” We’ll also ask Toibin about American Conservatory Theater’s staging of his controversial play “Testament.” Catholic groups are calling the play blasphemous for its portrayal of the Virgin Mary and are demanding the show be canceled.