"Liza Long is the single mother of a child with an undiagnosed mental disorder. When she heard about the Newtown shooting her first thought was, "What if my son does that someday?" She wrote an emotional response to the tragedy, which the Boise State University online journal posted as "I Am Adam Lanza's Mother." The post went viral, receiving 1.2 million Facebook likes, nearly 17,000 tweets, and 30,000 emails. Now, in The Price of Silence she takes...