Believing is Seeing by Errol Morris.
I really want to read this book after happening upon a feature on Morris in the Smithsonian Magazine. He seems funny.
"I'm amazed," Morris said when we spoke recently, "that you still see this nonsense all over the place, that truth is relative, that truth is subjective. People still cling to it." He calls these ideas "repulsive, repugnant. And what's the other word? False."