We make a prediction about the identity of the anonymous author of O: A Presidential Novel. Kurt Andersen talks with the playwright Jon Robin Baitz about “Other Desert Cities,” his new drama about a family in crisis. The director Lisa Cholodenko has a fresh take on the modern family with her Oscar-nominated movie “The Kids are All Right.” And in the new book, Spark, Studio 360 celebrates its first decade on the air and unlocks the secret to being a great artist.