When Norman Pearlstine—as editor in chief of Time Inc.—agreed to give prosecutor Patrick Fitzgerald a reporter’s notes of a conversation with a “confidential source,” he was vilified for betraying the freedom of the press. But in this hard-hitting inside story, Pearlstine shows that “Plamegate” was not the clear case it seemed to be—and that confidentiality has become a weapon in the White House’s war on the press, a war fought with the unwitting complicity of the press itself.