Harvard professor Greg Mankiw gives a thumbs up to Greg Ip, the U.S. Economics Editor of The Economist, based in Washington, D.C.:
"A terrific, very quick, and nontechnical introduction in economics (more macro than micro) is Greg Ip's Little Book of Economics. In case you don't know him, Greg writes for The Economist magazine and was previously at the Wall Street Journal. He now has a new edition of his book, together with an online guide to suggested readings."
See his website