ROBERT A. BURTON, M.D., graduated from Yale University and the University of California at San Francisco medical school, where he also completed his neurology residency. At age thirty-three, he was appointed chief of the Division of Neurology at UCSF Medical Center at Mt. Zion, where he subsequently became Associate Chief of the Department of Neurosciences. His books include On Being Certain: Believing You Are Right Even When You're Not, A Skeptic's Guide to the Mind; What Neuroscience Can and Cannot Tell Us About Ourselves, and three critically acclaimed novels. He has also written essays, book reviews and op-ed pieces for the New York Times, Salon.com, and Nautilus. He lives in the San Francisco Bay Area.