A.J. Jacobs is a human guinea pig, Esquire magazine writer, and author of four New York Times bestsellers. Among his books: The Know-It-All (in which he read the entire Encyclopedia Britannica from A to Z); The Year of Living Biblically (in which he followed all the rules of the Bible); and Drop Dead Healthy (in which he tried to become the healthiest person alive). He is an occasional contributor to NPR. He lives in New York with his wife and three children.