Some of my favorite Economics books include:

• Freakonomics: A Rogue Economist Explores the Hidden Side of Everything,
  Steven D. Levitt and Stephen J. Dubner.  NY times bestseller.  Applies the analytical tools of microeconomics and real data to explore a variety of curiosities. Discusses what schoolteachers and sumo wrestlers have in common, exploring the role of incentives and the phenomenon of cheating. Explains how the Ku Klux Klan is like a group of real-estate agents highlighting the power of information and what happens when that power is abused. Considers why, if crack dealing is so profitable, do most drug dealers still live with their moms, and reveals that conventional wisdom is often a web of fabrication, self-interest, and convenience. Explains how Roe v. Wade helped trigger, a generation later, the biggest crime drop in history and sorts out the facts of crime from the fictions. Examines, from a number of angles, whether and how parents matter for a number of child outcomes. Considers what kind of signal parents are sending when they name a child and whether a child's name really matters. Levitt teaches economics at the University of Chicago and recently received the John Bates Clark Metal. (description from AEA)
• The World is Flat:  A Brief History of the 21st Century by Thomas
  Friedman, a foreign affairs columnist for the NY Times who has won the Pulitzer Prize three times.
• A Random Walk Down Wall Street by Burton Malkiel.  This was my finance professor at Princeton who first got me started in saving and investing.
• New Ideas from Dead Economists by Todd Buchholz.  Great book of introductory principles.
• Liar's Poker by Michael Lewis.  A great look at the inner workings of a large investment bank.

Steven Landsburg, Armchair Economist: Economics and Everyday Experience, (New York: Free Press, 1995) ISBN 0029177766
       This book provides vignettes of everyday life with explanations of causes using ideas commonly used by economists.

Diane Coyle, Sex, Drugs and Economics: An Unconventional Introduction to Economics, (New York, Texere Publishing Ltd, 2002)
       With humor and irony, the author shows how economics can help to make decisions about the most basic of issues—whether to invest tax money in new roads or schools or how to combat world hunger and illegal drugs

Paul Krugman, The Great Unraveling (New York: Norton, 2003) ISBN 0393058506
       Krugman offers a critique of the Bush administration.

Jagdish Bagwati, In Defense of Globalization (Oxford, UK: Oxford University Press, 2004) ISBN 0195170253
Joseph E. Stiglitz, Globalization and Its Discontents (New York: Norton, 2003) ISBN 0393324397
       Bagwati and Stiglitz give contrasting views of globalization.

Joseph E. Stiglitz, Making Globalization Work (New York: W. W. Norton, 2006) ISBN 0393061221
       An imaginative and, above all, practical vision for a successful and equitable world, Nobel Prize winner Joseph E. Stiglitz's Making Globalization Work draws equally from his academic expertise and his time spent on the ground in dozens of countries around the world.