A Gallery of Economists found in The Worldly Philosophers by RL Heilbroner
Adam Smith, David Ricardo and Thomas Malthus
A Microeconomic Primer--What, How and for Whom to Produce
Critics of Capitalism: The Utopian Socialists, Robert Owen, John Stuart Mill and Karl Marx
Cracks in the Wall, Monopoly and Market Failures
Essentials of Macroeconomics--Will We Spend Enough to Put Everyone to Work