JOHN DERBYSHIRE writes a regular column for National Review as a contributing editor. He also contributes to National Review Online on a regular basis and writes for a variety of publications, including the Wall Street Journal, American Conservative, Washington Examiner, and the New Criterion. He writes on mathematics and is the author of the books Prime Obsession and Unknown Quantity, in addition to his opinion journalism. His novel, Seeing Calvin Coolidge in a Dream, was named a Notable Book of the Year by the New York Times. Derbyshire, a native of England, now lives with his wife and two children on Long Island, New York.