He took that acid trip while writing How to Change Your Mind: What the New Science of Psychedelics Teaches Us About Consciousness, Dying, Addiction, Depression, and Transcen­dence. It's the latest in a long list of New York Times best-selling books, which also includes The Omnivore's Dilemma: A Natural History of Four Meals, In Defense of Food: An Eater's Manifesto, and Cooked: A Natural History of Transformation.